CONDENSED CONSOLIDATED STATEMENTS OF EQUITY AND COMPREHENSIVE INCOME UNAUDITED (USD $) In Thousands	Total	Noncontrolling Interests [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income [Member]	Treasury Stock [Member]	Redeemable Noncontrolling Interests [Member]
Balance at Dec. 31, 2010	$ 389,608	$ 3,579	$ 33	$ 262,108	$ 370,272	$ 25,389	$ (271,773)	$ 26,984
Redemptions of redeemable noncontrolling interests	0	0	0	0	0	0	0	(839)
Contributions from redeemable noncontrolling interests	0	0	0	0	0	0	0	6,263
Deconsolidation of partnership	0	0	0	0	0	0	0	(4,103)
Net income	18,281	59	0	0	17,643	0	0	579
Net unrealized gains on securities available for sale, net of income tax	2,487	0	0	0	0	2,487	0	0
Foreign currency translation	24	0	0	0	0	24	0	0
Dividends declared	(814)	0	0	0	(814)	0	0	0
Stock based compensation expense	578	0	0	578	0	0	0	0
Purchase of treasury stock	(7,097)	0	0	0	0	0	(7,097)	0
Balance at Mar. 31, 2011	402,488	3,638	33	262,686	387,101	27,900	(278,870)	28,884
Balance at Dec. 31, 2011	407,411	3,439	33	264,409	409,191	22,520	(292,181)	6,071
Redemptions of redeemable noncontrolling interests	0	0	0	0	0	0	0	(3)
Contributions from redeemable noncontrolling interests	0	0	0	0	0	0	0	10,640
Net income	23,966	10	0	0	23,836	0	0	120
Net unrealized gains on securities available for sale, net of income tax	3,457	0	0	0	0	3,457	0	0
Foreign currency translation	(17)	0	0	0	0	(17)	0	0
Dividends declared	(1,064)	0	0	0	(1,064)	0	0	0
Stock based compensation expense	871	0	0	871	0	0	0	0
Purchase of treasury stock	(9,971)	0	0	0	0	0	(9,971)	0
Balance at Mar. 31, 2012	$ 424,533	$ 3,449	$ 33	$ 265,280	$ 431,963	$ 25,960	$ (302,152)	$ 16,828