CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2013	$ 504,897	$ 0	$ 67	$ 461,822	$ (2,722)	$ 45,730
Balance (in shares) at Dec. 31, 2013		0	66,828,670
Increase (Decrease) in Stockholders' Equity
Non-cash, stock-based compensation	15,076			15,076
Shares issued in connection with employee stock programs (in shares)			1,608,141
Shares issued in connection with employee stock programs	6,577		1	6,576
Tax benefit from employee stock transactions	3,424	0	0	3,424	0	0
Repurchase and retirement of common stock (in shares)		0	(4,092,039)
Repurchase and retirement of common stock	(100,003)	0	(4)	(28,484)	0	(71,515)
Net Income	82,009					82,009
Foreign currency translation	(7,403)				(7,403)
Balance at Sep. 30, 2014	$ 504,577	$ 0	$ 64	$ 458,414	$ (10,125)	$ 56,224
Balance (in shares) at Sep. 30, 2014		0	64,344,772