Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Consolidated Statements of Comprehensive (Loss) Income
Net income	$ 10,996us-gaap_NetIncomeLoss	$ 4,537us-gaap_NetIncomeLoss
Other comprehensive loss, net of tax:
Foreign currency translation adjustment during the period	(1,716)	(700)
Other comprehensive loss	(1,716)	(700)
Comprehensive income	$ 9,280	$ 3,837

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

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