Consolidated Statement of Shareholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Common Stock [Member]	Preferred Stock Including Additional Paid in Capital [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2010	$ 518,878	$ 76,307	$ 58,089	$ 652,288	$ (269,154)	$ 1,348	$ 0
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	39,137	0	0	0	39,137	0	0
Other comprehensive income/ (loss), net	2,246	0	0	0	0	2,246	0
Dividends paid to common shareholders: $0.04 per share	(3,089)	0	0	(3,089)	0	0	0
Dividends paid to preferred shareholders	(290)	0	0	(290)	0	0	0
Net proceeds from issuance of:
Shares of stock issued	5,534	828	0	4,706	0	0	0
Shares through incentive stock grants, net of cancellations and forfeitures	0	848	0	(848)	0	0	0
Amortization of stock compensation and employee stock purchase plan	6,867	0	0	6,867	0	0	0
Stock options exercised	205	40	0	165	0	0	0
Tax deficiency from certain stock compensation awards	(1,706)	0	0	(1,706)	0	0	0
Other equity adjustments	(1,657)	0	0	(1,657)	0	0	0
Ending Balance at Dec. 31, 2011	566,125	78,023	58,089	656,436	(230,017)	3,594	0
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	53,271	0	0	0	53,271	0	0
Other comprehensive income/ (loss), net	(1,470)	0	0	0	0	(1,470)	0
Dividends paid to common shareholders: $0.04 per share	(3,125)	0	0	(3,125)	0	0	0
Dividends paid to preferred shareholders	(290)	0	0	(290)	0	0	0
Repurchase of Carlyle warrants and Director's warrants	(15,000)	0	0	(15,000)	0	0	0
Net proceeds from issuance of:
Stock Issued During Period, Value, Employee Stock Purchase Plan	1,215	194	0	1,021	0	0	0
Shares through incentive stock grants, net of cancellations and forfeitures	0	422	0	(422)	0	0	0
Amortization of stock compensation and employee stock purchase plan	7,531	0	0	7,531	0	0	0
Stock options exercised	738	105	0	633	0	0	0
Tax deficiency from certain stock compensation awards	(1,588)	0	0	(1,588)	0	0	0
Other equity adjustments	(4,305)	0	0	(4,305)	0	0	0
Ending Balance at Dec. 31, 2012	603,102	78,744	58,089	640,891	(176,746)	2,124	0
Increase (Decrease) in Shareholders' Equity [Roll Forward]
Net income attributable to the Company	70,535	0	0	0	70,535	0	0
Other comprehensive income/ (loss), net	(6,321)	0	0	0	0	(6,321)	0
Dividends paid to common shareholders: $0.04 per share	(19,129)	0	0	(19,129)	0	0	0
Dividends paid to preferred shareholders	(2,660)	0	0	(2,660)	0	0	0
Stock Repurchased and Retired During Period, Value	(69,827)	0	(58,089)	(11,738)	0	0	0
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	171	0	0	0	0	0	171
Net proceeds from issuance of:
Shares of stock issued	47,753	0	47,753	0	0	0	0
Stock Issued During Period, Value, Employee Stock Purchase Plan	1,230	157	0	1,073	0	0	0
Shares through incentive stock grants, net of cancellations and forfeitures	0	622	0	(622)	0	0	0
Amortization of stock compensation and employee stock purchase plan	6,747	0	0	6,747	0	0	0
Stock options exercised	2,332	315	0	2,017	0	0	0
Tax deficiency from certain stock compensation awards	(663)	0	0	(663)	0	0	0
Other equity adjustments	418	0	0	418	0	0	0
Ending Balance at Dec. 31, 2013	$ 633,688	$ 79,838	$ 47,753	$ 616,334	$ (106,211)	$ (4,197)	$ 171