CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (28,328)us-gaap_ProfitLoss	$ 95,566us-gaap_ProfitLoss	$ 129,674us-gaap_ProfitLoss
Other comprehensive (loss) income:
Unrealized gains on available-for-sale securities (net of taxes of $183, $208 and $177, respectively)	976	1,244	1,008
Reclassification adjustment for gains on available-for-sale securities included in net income (net of taxes of $508)	(2,880)	0	0
Foreign currency translation adjustments	(88,725)	(70,791)	17,925
Unfunded pension liability (net of taxes of $248, $123 and $231, respectively)	(657)	359	(654)
Other comprehensive (loss) income	(91,286)	(69,188)	18,279
Comprehensive (loss) income	$ (119,614)us-gaap_ComprehensiveIncomeNetOfTax	$ 26,378us-gaap_ComprehensiveIncomeNetOfTax	$ 147,953us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature, attributable to parent entity.

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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

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Amount after tax, before reclassification adjustments, of unrealized holding gain (loss) on available-for-sale securities.

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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