| Sep'18 | Jun'18 | Mar'18 | Dec'17 | Sep'17 | Jun'17 | Mar'17 | Dec'16 | Sep'16 | Jun'16 | Mar'16 | Dec'15 | Sep'15 | Jun'15 | Mar'15 | Dec'14 | Sep'14 | Jun'14 | Mar'14 | Dec'13 | Sep'13 | Jun'13 | Mar'13 | Dec'12 | Sep'12 | Jun'12 | Mar'12 | Dec'11 | Sep'11 | Jun'11 | Mar'11 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Operating activities: | ||||||||||||||||||||||||||||||
Net income (loss) | ||||||||||||||||||||||||||||||
- | - | -12,857 | - | - | - | 1,473 | -20,648 | -18,856 | -36,906 | -85,312 | -92,181 | -182,769 | -259,107 | -208,222 | -17,148 | 14,966 | -16,120 | -3,548 | -117,106 | -2,674 | 9,023 | -3,049 | -1,625 | -2,479 | 22,822 | -742 | -15,980 | 37,571 | 25,667 | -16,773 |
Adjustments to reconcile net income (loss) to net cash provided by operating activities: | ||||||||||||||||||||||||||||||
Depletion, depreciation and amortization | ||||||||||||||||||||||||||||||
33,022 | 23,494 | 23,537 | 28,200 | 25,521 | 22,333 | 16,035 | 16,762 | 12,474 | 10,865 | 10,361 | 13,924 | 21,900 | 26,602 | 31,912 | 35,641 | 32,980 | 31,625 | 31,908 | 35,992 | 26,674 | 28,796 | 24,882 | 22,798 | 19,600 | 18,958 | 17,058 | 16,773 | 14,231 | 13,691 | 12,969 |
Impairment of proved oil and gas properties | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | - | 0 | 0 | 0 | 58,000 | 77,000 | 198,000 | 210,000 | 220,000 | 120,000 | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - |
Amortization of deferred financing costs and long-term debt premium and discount | ||||||||||||||||||||||||||||||
653 | 613 | 537 | 535 | 538 | 520 | 7,743 | 1,318 | 1,312 | 1,307 | 1,303 | 6,763 | 1,701 | 1,617 | 1,497 | 570 | 579 | 589 | 599 | 604 | 632 | 642 | 603 | 654 | 333 | 434 | 270 | 268 | 264 | 260 | 252 |
Stock-based compensation | ||||||||||||||||||||||||||||||
4,156 | 4,489 | 8,850 | 3,209 | 3,001 | 2,978 | 2,973 | 1,172 | 1,410 | 1,409 | 2,324 | 3,169 | 3,017 | 2,928 | 3,034 | 4,486 | 4,503 | 4,452 | 2,890 | 4,418 | 3,383 | 4,621 | 2,502 | 2,496 | 2,758 | 2,303 | 1,842 | 2,216 | 2,179 | 2,107 | 1,425 |
Commodity derivative instruments (gain) loss | ||||||||||||||||||||||||||||||
-32,619 | -12,120 | -9,402 | -10,234 | -13,719 | 7,458 | 10,840 | -8,045 | 3,972 | -19,552 | 3,841 | 22,449 | 50,399 | -21,266 | 24,910 | 120,789 | 27,450 | -22,164 | -7,934 | 1,170 | -16,561 | 6,841 | -6,786 | -3,769 | -24,478 | 38,735 | -5,312 | -54,076 | 41,140 | 42,239 | -34,624 |
Commodity derivative settlement gain (loss) | ||||||||||||||||||||||||||||||
-39,108 | 9,343 | 7,277 | -30 | 5,166 | -1,656 | 250 | 18,361 | 21,357 | 20,544 | 27,748 | 26,586 | 24,386 | 17,988 | 24,190 | 22,050 | -5,009 | -7,303 | -4,750 | 187 | 21,850 | 6,883 | 6,892 | - | - | - | - | - | - | - | - |
Unrealized contingent payment derivative instrument gain | ||||||||||||||||||||||||||||||
2,425 | 3,703 | 2,579 | - | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Deferred income tax benefit | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | 0 | 0 | 0 | -22,354 | -3,720 | 7,367 | -6,681 | -1,106 | -66,621 | -1,618 | 5,379 | -1,803 | 200 | -1,527 | 13,634 | -442 | -9,882 | 22,551 | 14,926 | -9,725 |
Change in operating assets and liabilities: | ||||||||||||||||||||||||||||||
Accounts receivable | ||||||||||||||||||||||||||||||
-4,483 | 329 | -7,443 | -4,949 | 1,175 | 21,863 | -10,497 | 8,049 | 4,632 | 7,670 | -2,332 | -703 | -5,701 | -1,940 | -12,872 | -10,931 | 2,797 | -1,064 | -27,570 | -1,503 | 3,290 | 1,354 | 12,820 | 889 | 2,995 | 3,591 | 7,842 | 7,046 | 15,204 | -11,125 | 5,410 |
Other current assets | ||||||||||||||||||||||||||||||
-488 | 598 | 259 | -55 | 519 | 107 | 6 | -539 | 30 | 526 | -126 | 40 | -1,345 | 917 | 66 | 324 | 640 | -234 | -24 | -158 | 211 | 196 | -788 | 409 | -558 | 147 | -136 | 110 | 64 | 138 | -79 |
Accounts payable and accrued expenses | ||||||||||||||||||||||||||||||
12,631 | 1,450 | 7,925 | -5,997 | 20,082 | 8,030 | 3,222 | 16,104 | 17,588 | 6,829 | -5,001 | -6,778 | -462 | -4,113 | -15,820 | -18,725 | 5,286 | 6,512 | -7,370 | -14,708 | 20,574 | 11,504 | 8,535 | -12,383 | 1,989 | -7,913 | 13,448 | 12,984 | 2,324 | -2,924 | 6,250 |
Accrued interest payable | ||||||||||||||||||||||||||||||
12,809 | -10,062 | 11,168 | -11,077 | 10,872 | -6,432 | 8,427 | -8,580 | 8,571 | -8,468 | 8,497 | -8,530 | 8,499 | -8,444 | 8,500 | - | 7,430 | -7,456 | 8,501 | -8,463 | 8,203 | -8,558 | 8,859 | -3,520 | 5,315 | 3,786 | -21 | - | - | - | - |
Net cash provided by operating activities | ||||||||||||||||||||||||||||||
78,266 | 14,399 | 45,890 | 25,282 | 59,791 | 12,885 | 39,274 | 25,024 | 35,222 | 6,936 | 16,537 | -1,833 | 30,919 | 9,760 | 30,633 | 14,521 | 37,215 | 29,080 | 62,652 | 22,420 | 46,384 | 36,133 | 28,391 | 9,191 | 27,010 | 11,551 | 29,019 | 32,209 | 18,794 | 26,393 | 23,691 |
Investing activities: | ||||||||||||||||||||||||||||||
Oil and gas exploration and development expenditures | ||||||||||||||||||||||||||||||
110,397 | 123,222 | 57,513 | 87,101 | 100,488 | 76,186 | 42,298 | 30,027 | 37,745 | 37,567 | 23,001 | 8,254 | 9,245 | 16,083 | 34,054 | 52,185 | 40,878 | 41,504 | 48,998 | 68,697 | 75,469 | 74,061 | 43,531 | 53,056 | 60,745 | 53,598 | 44,842 | 54,402 | 47,973 | 45,371 | 21,470 |
Proceeds from sale of oil and gas properties | ||||||||||||||||||||||||||||||
493 | 5,288 | 2,450 | 169,736 | 8,147 | 6,109 | 14,183 | - | - | - | 166 | 228,324 | -205 | 40,136 | 518 | 3,266 | 3,128 | -77 | 4,805 | -1,810 | 72,919 | 30 | 50,222 | 150 | 49,523 | 16 | 3 | 23 | 216 | 4,476 | 29 |
Purchase of oil and gas properties | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 0 | 971 | 0 | 256,977 | - | - | - | - | - | - | - | - |
Deposit for Bronco acquisition | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | 16,000 | - | - | - | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Purchase of other property and equipment | ||||||||||||||||||||||||||||||
1,224 | 1,251 | 794 | -115 | 1,121 | 2,376 | 20 | 0 | 37 | 39 | 30 | 40 | 36 | 16 | 32 | 47 | 168 | 596 | 1,114 | 1,503 | 366 | 200 | 398 | 202 | 230 | 292 | 808 | 141 | 745 | 281 | 34 |
Restricted cash | ||||||||||||||||||||||||||||||
- | - | - | -1,102 | 33 | -712 | 737 | 0 | 2 | 1,637 | 1 | -148 | 0 | 1 | 1,636 | 1 | 0 | 1,637 | 1 | 1 | 0 | 1,639 | -1,843 | 0 | 1 | 0 | 1,820 | - | - | - | - |
Other long-term assets | ||||||||||||||||||||||||||||||
- | - | - | 0 | -23 | -4 | -4 | -44 | -13 | -12 | -13 | -12 | -20 | -14 | -13 | 352 | -314 | -123 | -29 | -22 | 7,479 | -7,526 | 4,978 | - | - | - | - | -23 | -23 | 1,242 | -1,287 |
Net cash used in investing activities | ||||||||||||||||||||||||||||||
-111,128 | -119,185 | -55,857 | 73,852 | -83,472 | -217,001 | -44,868 | -123,408 | -4,777 | -39,429 | -22,853 | 220,190 | -9,466 | 24,050 | -35,191 | -49,319 | -37,604 | -43,691 | -45,279 | -71,989 | -11,366 | -68,344 | -253,819 | -302,036 | -18,307 | -79,637 | -47,467 | -54,620 | -97,960 | -44,238 | -20,188 |
Financing activities: | ||||||||||||||||||||||||||||||
Proceeds from bank borrowings | ||||||||||||||||||||||||||||||
102,000 | 170,000 | 67,000 | 90,000 | 78,000 | 140,000 | 73,000 | 83,000 | 16,000 | 57,500 | 0 | 52,000 | 27,000 | 44,000 | 60,000 | 116,000 | 90,500 | 121,000 | 106,000 | 137,000 | 117,000 | 105,000 | 279,000 | 275,100 | 95,300 | 232,100 | 47,100 | 33,000 | 182,100 | 91,700 | 46,400 |
Repayments of bank borrowings | ||||||||||||||||||||||||||||||
65,000 | 137,000 | 57,000 | 185,000 | 53,000 | 59,000 | 64,000 | 73,000 | 46,000 | 27,500 | 0 | 190,625 | 47,500 | 124,500 | 55,375 | 216,000 | 90,500 | 106,000 | 121,000 | 87,000 | 152,000 | 175,000 | 51,000 | 131,100 | 104,300 | 393,100 | 29,100 | 8,500 | 103,100 | 107,200 | 92,300 |
Repayment of term loan | ||||||||||||||||||||||||||||||
- | - | - | 0 | 0 | 0 | 128,303 | - | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Payment of financing costs | ||||||||||||||||||||||||||||||
- | - | - | -1 | 228 | 2,463 | 2,605 | - | 0 | 0 | 0 | 0 | 0 | 57 | 3,687 | - | - | - | - | 0 | -203 | 272 | 1,865 | - | - | - | - | - | - | - | - |
Payment of preferred dividend | ||||||||||||||||||||||||||||||
1,269 | 1,270 | 1,269 | 1,270 | 1,269 | 1,269 | 1,397 | - | 0 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Redemption of restricted stock for employee income taxes | ||||||||||||||||||||||||||||||
166 | 779 | 2,114 | 1 | 98 | 53 | 3,242 | 49 | 9 | 4 | 60 | 18 | 2 | 4 | 152 | 52 | 137 | 54 | 1,492 | - | - | - | - | - | - | - | - | - | - | - | - |
Proceeds from exercise of employee options to purchase common stock | ||||||||||||||||||||||||||||||
58 | 111 | 205 | 10 | 65 | 84 | 93 | 50 | 48 | 0 | 0 | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - |
Proceeds from exercise of warrants | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 31,825 | 42,592 |
Net cash provided by financing activities | ||||||||||||||||||||||||||||||
35,316 | 104,984 | 6,822 | -96,260 | 23,470 | 204,174 | -126,454 | 230,565 | -29,961 | 29,996 | -60 | -210,340 | -20,502 | -34,061 | 786 | 38,441 | -137 | 14,946 | -16,492 | 48,651 | -34,960 | 31,449 | 226,135 | 291,347 | -9,123 | 70,251 | 18,000 | 23,368 | 78,970 | 16,180 | -3,308 |
Net decrease in cash and cash equivalents | ||||||||||||||||||||||||||||||
2,454 | 198 | -3,145 | 2,874 | -211 | 58 | -132,048 | 132,181 | 484 | -2,497 | -6,376 | 8,017 | 951 | -251 | -3,772 | 3,643 | -526 | 335 | 881 | -918 | 58 | -762 | 707 | -1,498 | -420 | 2,165 | -448 | 957 | -196 | -1,665 | 195 |
Cash paid during the period for: | ||||||||||||||||||||||||||||||
Interest, net of amounts capitalized | ||||||||||||||||||||||||||||||
- | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | - | 809 | 556 | 823 | 903 |