| Dec'19 | Dec'18 | Dec'17 | Dec'16 | Dec'15 | Dec'14 | Dec'13 | Dec'12 | Dec'11 | Dec'10 | Dec'09 |
|---|---|---|---|---|---|---|---|---|---|---|
Less: | ||||||||||
Lower of cost or net realizable value inventory adjustments | ||||||||||
1,810 | 1,711 | 6,379 | 20,374 | 31,772 | 8,186 | 3,650 | 568 | 698 | - | 440 |
Costs associated with abnormal production and other | ||||||||||
- | - | - | 1,707 | 10,405 | 0 | 0 | - | - | - | 21,525 |
Other Cost of Goods Sold | ||||||||||
- | - | - | - | - | - | - | - | - | 1,136 | - |
Gross Margin | ||||||||||
43,478 | 38,271 | 11,888 | -26,797 | -15,477 | 42,004 | 77,915 | 170,138 | 186,220 | 106,071 | 122,115 |
Selling and administrative | ||||||||||
23,556 | 20,438 | 18,915 | 20,034 | 27,486 | 27,223 | 33,768 | 33,750 | 31,807 | 29,122 | 28,375 |
Debt restructuring expense | ||||||||||
- | - | - | 3,072 | 0 | 0 | - | - | - | - | - |
Asset Retirement Obligation, Accretion Expense | ||||||||||
1,793 | 1,668 | 1,558 | 1,768 | 1,696 | 1,623 | 1,499 | 724 | 750 | 704 | 680 |
Restructuring expense | ||||||||||
- | - | 266 | 2,723 | - | 1,827 | 0 | 0 | - | - | - |
Impairment of long-lived assets | ||||||||||
- | - | - | - | 323,796 | 0 | 0 | - | - | - | - |
Care and maintenance expense | ||||||||||
549 | 530 | 1,687 | 2,603 | 0 | 0 | - | - | - | - | - |
Insurance settlements income from property and business losses | ||||||||||
- | - | - | - | - | - | - | - | 12,500 | 0 | -10 |
Other operating (income) expense | ||||||||||
-1,220 | -141 | -3,523 | 1,666 | -1,335 | 4,449 | -1,806 | -263 | 7,714 | 911 | 643 |
Operating (Loss) Income | ||||||||||
16,360 | 15,494 | -14,061 | -55,331 | -369,790 | 15,780 | 40,842 | 135,401 | 173,877 | 75,334 | 92,407 |
Other Income (Expense) | ||||||||||
Interest Expense | ||||||||||
3,031 | 3,855 | 11,692 | 11,622 | 6,351 | 6,232 | 1,531 | 905 | 869 | 1,513 | 806 |
Interest income | ||||||||||
- | - | - | 286 | 763 | 186 | 524 | 1,843 | 1,730 | 819 | 161 |
Other (expense) income | ||||||||||
355 | 252 | 403 | 1,122 | 575 | 1,077 | -1,742 | 588 | 523 | 403 | 485 |
(Loss) Income Before Income Taxes | ||||||||||
13,684 | 11,891 | -25,350 | -65,545 | -374,803 | 10,811 | 38,093 | 136,927 | 175,261 | 75,043 | 92,247 |
Income Tax Expense (Benefit) | ||||||||||
53 | 108 | -2,783 | -1,362 | 149,973 | 1,050 | 15,818 | 49,484 | 65,850 | 29,758 | 36,905 |
Net Income (Loss) Attributable to Parent | ||||||||||
13,631 | 11,783 | -22,567 | -64,183 | -524,776 | 9,761 | 22,275 | 87,443 | 109,411 | 45,285 | 55,342 |
Weighted Average Shares Outstanding: | ||||||||||
Basic and diluted (in shares) | ||||||||||
- | - | - | - | 75,669 | - | - | - | - | - | - |
Basic (in shares) | ||||||||||
129,049 | 128,070 | 115,708 | 75,819 | - | 75,504 | 75,378 | 75,276 | 75,180 | 75,084 | 75,014 |
Diluted (in shares) | ||||||||||
131,050 | 130,986 | 115,709 | 75,818 | - | 75,630 | 75,406 | 75,336 | 75,281 | 75,154 | 75,042 |
Earnings Per Share [Abstract] | ||||||||||
Basic and diluted (in dollars per share) | ||||||||||
- | - | - | - | -6.94 | - | - | - | - | - | - |
Basic (in dollars per share) | ||||||||||
0.11 | 0.09 | -0.20 | -0.85 | - | 0.13 | 0.30 | 1.16 | 1.46 | 0.60 | 0.74 |
Diluted (in dollars per share) | ||||||||||
0.10 | 0.09 | -0.20 | -0.85 | - | 0.13 | 0.30 | 1.16 | 1.45 | 0.60 | 0.74 |
Mineral [Member] | ||||||||||
Revenue from Contract with Customer, Including Assessed Tax | ||||||||||
220,075 | 208,270 | 177,915 | 212,097 | 287,183 | 410,389 | 336,312 | 451,316 | 442,954 | 359,304 | 301,803 |
Cost of Goods Sold | ||||||||||
126,110 | 121,955 | 117,962 | 169,745 | 217,821 | 303,914 | 212,864 | 236,480 | 213,670 | 211,663 | 127,822 |
Freight Costs [Member] | ||||||||||
Cost of Goods Sold | ||||||||||
40,056 | 37,052 | 32,016 | 36,062 | 28,723 | 43,223 | 28,856 | 29,164 | 28,339 | 29,751 | 21,469 |
Warehouse and Handling [Member] | ||||||||||
Cost of Goods Sold | ||||||||||
8,621 | 9,281 | 9,670 | 11,006 | 13,939 | 13,062 | 13,027 | 14,966 | 14,027 | 10,683 | 8,432 |