CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating activities
Net (loss) income	$ (59,504)	$ 55,189
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	40,893	37,059
Provision for doubtful accounts	267	395
Deferred income taxes	(30,354)	(1,673)
Excess tax benefits from stock based compensation		(372)
Lower of cost or market and other inventory adjustments	4,372	2,798
(Gain) loss on disposal or impairment of assets	(148)	4,864
Foreign currency transaction (gain) loss, net	(173)	82
Stock compensation expense	6,063	5,887
Loss on derivative instruments	11,730
Changes in operating assets and liabilities:
Trade accounts and other receivables	71,870	11,358
Inventories	20,042	(21,020)
Prepaid expenses and other current assets	239	(1,746)
Long-term other assets	1,329	157
Accounts payable	(6,804)	8,501
Accrued expenses	(8,776)	(1,572)
Accrued income taxes, net	17,083	(3,123)
Net cash provided by operating activities	68,129	96,784
Investing activities
Capital expenditures	(51,333)	(131,232)
Net cash used in investing activities	(51,333)	(131,232)
Financing activities
Proceeds from bank borrowings	70,000
Repayments on bank borrowings	(7,000)
Dividends paid	(12,339)	(21,500)
Purchase of common stock	(551)	(6,892)
Excess tax benefits from stock based compensation		372
Net cash provided by (used in) financing activities	50,110	(28,020)
Effect of exchange rate changes on cash	(510)	(1,678)
Net increase (decrease) in cash and cash equivalents	66,396	(64,146)
Cash and cash equivalents at beginning of period	24,298	94,250
Cash and cash equivalents at end of period	90,694	30,104
Supplemental cash flow information
Interest paid	$ 1,431	20
Income taxes paid		$ 30,476