Consolidated Statements of Stockholders' Equity (USD $) In Thousands, unless otherwise specified	Total	Preferred Stock Including Additional Paid in Capital [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Noncontrolling Interest [Member]
Beginning Balance at Dec. 31, 2012	$ 603,102	$ 58,089	$ 78,744	$ 640,891	$ (176,746)	$ 2,124	$ 0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the Company	13,203	0	0	0	13,203	0	0
Other comprehensive income/ (loss), net of tax	564	0	0	0	0	564	0
Dividends paid to common shareholders	(4,003)	0	0	(4,003)	0	0	0
Dividends paid to preferred shareholders	(363)	0	0	(363)	0	0	0
Net proceeds from issuance of common stock	551	0	72	479	0	0	0
Issuance of shares through incentive stock grants, net of shares canceled or forfeited	0	0	81	(81)	0	0	0
Amortization of stock compensation and employee stock purchase plan	2,278	0	0	2,278	0	0	0
Stock options exercised	1,202	0	157	1,045	0	0	0
Tax deficiency from certain stock compensation awards	(672)	0	0	(672)	0	0	0
Other equity adjustments	2,344	0	0	2,344	0	0	0
Ending Balance at Mar. 31, 2013	617,078	58,089	79,054	641,918	(163,543)	1,560	0
Beginning Balance at Dec. 31, 2013	633,688	47,753	79,838	616,334	(106,211)	(4,197)	171
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income attributable to the Company	17,041	0	0	0	17,041	0	0
Other comprehensive income/ (loss), net of tax	(892)	0	0	0	0	(892)	0
Dividends paid to common shareholders	(6,386)	0	0	(6,386)	0	0	0
Dividends paid to preferred shareholders	(869)	0	0	(869)	0	0	0
Distributions to noncontrolling interests	(61)	0	0	0	0	0	(61)
Net proceeds from issuance of common stock	575	0	61	514	0	0	0
Issuance of shares through incentive stock grants, net of shares forfeited, canceled, or withheld for employee taxes, value	(313)	0	(66)	(247)	0	0	0
Amortization of stock compensation and employee stock purchase plan	1,197	0	0	1,197	0	0	0
Stock options exercised	1,311	0	168	1,143	0	0	0
Tax deficiency from certain stock compensation awards	(26)	0	0	(26)	0	0	0
Other equity adjustments	(1,070)	0	0	(1,070)	0	0	0
Ending Balance at Mar. 31, 2014	$ 645,979	$ 47,753	$ 80,001	$ 610,590	$ (89,170)	$ (3,305)	$ 110