Condensed Consolidated Statement of Equity (Unaudited) - 3 months ended Mar. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive (Loss) Income [Member]
Beginning Balance, Shares at Dec. 31, 2015	88,228	88,228
Beginning Balance at Dec. 31, 2015	$ 1,049,490	$ 1	$ 551,206	$ 618,399	$ (120,116)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	27,480			27,480
Shares issued in connection with share-based compensation (shares)		615
Shares issued in connection with share-based compensation (value)	6,296		6,296
Tax withholdings related to net share settlements of restricted stock units	(7,178)		(7,178)
Share-based compensation	9,543		9,543
Other comprehensive income	$ 9,283				9,283
Ending Balance, Shares at Mar. 31, 2016	88,843	88,843
Ending Balance at Mar. 31, 2016	$ 1,094,914	$ 1	$ 559,867	$ 645,879	$ (110,833)