CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 90,694	$ 24,298
Trade accounts and other receivables, net	60,053	132,573
Inventories:
Finished goods	85,054	106,941
Raw materials and supplies	29,204	37,502
Total inventories	114,258	144,443
Prepaid expenses and other current assets	5,016	5,241
Prepaid income taxes	975	19,708
Deferred income taxes	38,668	11,348
Total current assets	309,664	337,611
Property, plant and equipment:
Land and land improvements	43,225	40,921
Land-use and mineral rights	19,877	19,877
Buildings	75,961	74,911
Machinery and equipment	631,331	627,517
Construction in progress	142,159	109,378
Total	912,553	872,604
Less accumulated depreciation and amortization	338,792	303,888
Net property, plant and equipment	573,761	568,716
Goodwill	12,164	12,164
Intangible and other assets, net	17,759	15,735
Total assets	913,348	934,226
Current liabilities:
Bank borrowings	88,000	25,000
Accounts payable	10,936	22,922
Accrued payroll and benefits	5,499	12,466
Accrued freight	2,025	5,925
Accrued utilities	2,103	3,714
Dividends payable	2,329
Derivative instruments	6,232
Other accrued expenses	10,961	7,388
Total current liabilities	128,085	77,415
Deferred income taxes	77,723	$ 80,754
Derivative instruments	$ 5,498
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; 23,290,865 and 23,092,674 shares issued and outstanding at September 30, 2015 and December 31, 2014, respectively	$ 233	$ 231
Additional paid-in capital	63,728	59,297
Retained earnings	664,775	739,498
Accumulated other comprehensive loss	(26,694)	(22,969)
Total shareholders' equity	702,042	776,057
Total liabilities and shareholders' equity	$ 913,348	$ 934,226