CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY (USD $) In Thousands, unless otherwise specified	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2010	$ 0	$ 34	$ 232,524	$ 206,210	$ (4,494)	$ (3,433)	$ 430,841
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	0	0	0	(157,693)	0	1,644	(156,049)
Repurchases of common stock	0	(2)	0	0	(23,688)	0	(23,690)
Exercise of stock options	0	1	4,824	0	0	0	4,825
Tax effect of stock options and restricted stock units	0	0	(2,719)	0	0	0	(2,719)
Share-based employee compensation expense	0	0	9,246	0	0	0	9,246
Issuance of Warrants							0
Issuance of stock in conjunction with acquisition	0	0	3,262	0	0	0	3,262
Balance at Dec. 31, 2011	0	33	247,137	48,517	(28,182)	(1,789)	265,716
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)							8,884
Repurchases of common stock	0	0	0	8,024	0	860	8,884
Exercise of stock options	0	1	2,834	0	0	0	2,835
Tax effect of stock options and restricted stock units	0	0	(5,043)	0	0	0	(5,043)
Share-based employee compensation expense	0	0	6,371	0	0	0	6,371
Issuance of Warrants							0
Issuance of stock in conjunction with acquisition	0	0	58	0	0	0	58
Balance at Dec. 31, 2012	0	34	251,357	56,541	(28,182)	(929)	278,821
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Comprehensive income (loss)	0	0	0	(8,541)	0	522	(8,019)
Exercise of stock options	0	1	12,747	0	0	0	12,748
Tax effect of stock options and restricted stock units	0	0	(3,225)	0	0	0	(3,225)
Share-based employee compensation expense	0	0	7,116	0	0	0	7,116
Issuance of Warrants	0	0	15,150	0	0	0	15,150
Issuance of stock in conjunction with acquisition	0	0	467	0	0	0	467
Other	0	0	(368)	0	0	0	(368)
Balance at Dec. 31, 2013	$ 0	$ 35	$ 283,244	$ 48,000	$ (28,182)	$ (407)	$ 302,690