CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total Stockholders' Equity [Member]	Consolidated Entity Excluding RSO [Member]	Consolidated Entity Excluding RSO [Member] Noncontrolling Interests [Member]	VIE - RSO [Member]	VIE - RSO [Member] Noncontrolling Interests [Member]
Balance, beginning of period at Dec. 31, 2012	$ 733,790	$ 295	$ 286,048	$ (29,486)	$ (103,472)	$ (2,197)	$ 151,188		$ 279		$ 582,323
Balance, beginning of period (in shares) at Dec. 31, 2012		20,155,732
Increase (Decrease) Equity [Roll Forward]
Net income	12,767			496			496		(43)		12,314
Issuance of common shares	1	1					1
Treasury shares issued (in shares)		10,452
Treasury shares issued	87		(21)		108		87
Stock-based compensation (in shares)		12,594
Stock-based compensation	313	0	313				313
Repurchases of common stock (in shares)		(11,529)
Repurchases of common stock	(82)	0			(82)		(82)
Cash dividends	(590)			(590)			(590)
Distributions	1						0		1
Activity of consolidated VIE	26,376										26,376
Other comprehensive (loss) income	5,175					(128)	(128)	(128)	0	5,303	5,303
Balance, end of period at Mar. 31, 2013	$ 777,838	$ 296	$ 286,340	$ (29,580)	$ (103,446)	$ (2,325)	$ 151,285		$ 237		$ 626,316
Balance, end of period (in shares) at Mar. 31, 2013		20,167,249