CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Current assets:
Cash and cash equivalents	$ 91,680	$ 78,866
Trade accounts and other receivables, net	23,622	48,596
Inventories:
Finished goods	74,133	77,537
Raw materials and supplies	23,041	27,021
Total inventories	97,174	104,558
Prepaid expenses and other current assets	3,548	3,762
Prepaid income taxes	1,199	0
Deferred income taxes		49,495
Total current assets	217,223	285,277
Property, plant and equipment:
Land and land improvements	45,530	45,774
Land-use and mineral rights	19,696	19,877
Buildings	87,318	83,500
Machinery and equipment	647,753	642,396
Construction in progress	92,704	96,084
Total	893,001	887,631
Less accumulated depreciation and amortization	398,898	349,900
Net property, plant and equipment	494,103	537,731
Goodwill	3,500	3,500
Intangible and other assets, net	8,631	9,861
Total assets	723,457	836,369
Current liabilities:
Long-term debt, current portion	13,000	33,000
Notes payable	551	0
Accounts payable	7,782	10,709
Accrued payroll and benefits	3,434	6,003
Accrued freight	593	3,068
Accrued utilities	1,169	2,414
Accrued income taxes		139
Derivative instruments	1,599	6,240
Other accrued expenses	6,676	8,717
Total current liabilities	34,804	70,290
Deferred income taxes	1,236	63,858
Long-term debt	42,404	55,000
Notes payable, related parties	25,000	0
Other long-term liabilities	3,443	4,915
Shareholders’ equity:
Preferred stock, par value $0.01 per share, 5,000 shares authorized, none outstanding
Common stock, par value $0.01 per share, 80,000,000 shares authorized; 26,881,066 and 23,280,696 shares issued and outstanding at December 31, 2016 and 2015, respectively	269	233
Additional paid-in capital	117,192	65,067
Retained earnings	533,435	614,708
Accumulated other comprehensive loss	(34,326)	(37,702)
Total shareholders’ equity	616,570	642,306
Total liabilities and shareholders’ equity	$ 723,457	$ 836,369