CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
CASH FLOWS FROM OPERATING ACTIVITIES
Consolidated net income	$ 153	$ 28,760
Adjustments to reconcile consolidated net income to net cash provided by (used in) operating activities:
Depreciation and amortization	30,839	31,734
Amortization of debt premium	(76)	0
Amortization of debt issuance costs	6,304	1,451
(Gain) loss on property, plant and equipment	(115)	415
Earnings from unconsolidated joint venture, net of dividends received	167	100
Deferred income tax benefit	(1,531)	(502)
Share-based compensation	4,530	3,737
Decrease (increase) in:
Accounts receivable	(42,338)	(44,466)
Inventories of products, materials and supplies	(1,224)	7,154
Other assets	(1,818)	(848)
Increase (decrease) in:
Accounts payable-trade	(1,836)	24,763
Other payables and accruals	(8,880)	(1,004)
Other long-term liabilities	3,188	622
Due to related party	8,188	16,822
Net cash provided by (used in) operating activities	(4,449)	68,738
CASH FLOWS FROM INVESTING ACTIVITIES
Purchase of property, plant and equipment	(34,742)	(22,548)
Purchase of software	(1,945)	(2,109)
Settlement of net investment hedge	(2,225)	2,854
Net cash used in investing activities	(38,912)	(21,803)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from debt	40,000	101,250
Repayments of debt	(136,875)	(3,750)
Capital lease payments	(950)	0
Contribution from noncontrolling interest	15,174	0
Proceeds from the exercise of stock options	310	260
Debt issuance costs	(4,794)	(2,728)
Net cash provided by (used in) financing activities	(87,135)	95,032
Effect of exchange rate differences on cash	(4,001)	(2,584)
Net increase (decrease) in cash and cash equivalents	(134,497)	139,383
Cash and cash equivalents, beginning of period	223,166	88,579
Cash and cash equivalents, end of period	88,669	227,962
Supplemental disclosures:
Cash paid during the period for income taxes, net of refunds received	5,463	10,913
Cash paid during the period for interest, net of capitalized interest	13,170	11,050
Capitalized interest	1,940	1,131
Supplemental non-cash disclosures:
Capital accruals	5,298	2,842
Capital lease liability included in accounts payable	$ 1,950	$ 0