Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Net earnings	$ 107,332us-gaap_ProfitLoss	$ 84,195us-gaap_ProfitLoss
Other comprehensive income (loss), net of tax:
Foreign currency translation adjustments, net of tax of $10,560 and $1,329 for the three months ended March 31, 2015 and 2014	(19,605)	(2,377)
Other comprehensive loss	(19,605)	(2,377)
Comprehensive income	87,727	81,818
Less comprehensive income attributable to the noncontrolling interest	297	420
Comprehensive income attributable to shareholders	$ 87,430us-gaap_ComprehensiveIncomeNetOfTax	$ 81,398us-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, before 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.

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