Condensed Consolidated Statement of Stockholder's Equity (Unaudited) - 3 months ended Mar. 31, 2017 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]
Beginning balance, shares at Dec. 31, 2016	84,368	84,368
Beginning balance at Dec. 31, 2016	$ 1,002,984	$ 1	$ 400,452	$ 724,949	$ (122,418)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	15,438			15,438
Shares issued in connection with share-based compensation (shares)		762
Shares issued in connection with share-based compensation (value)	2,390		2,390
Tax withholdings related to net share settlements of restricted stock units	(12,262)		(12,262)
Share-based compensation	12,167		12,167
Shares repurchased and retired, shares		(500)
Shares repurchased and retired	(19,837)		(19,837)
Other comprehensive income	$ 14,972				14,972
Ending balance, shares at Mar. 31, 2017	84,630	84,630
Ending balance at Mar. 31, 2017	$ 1,015,852	$ 1	$ 382,910	$ 740,387	$ (107,446)