CONSOLIDATED STATEMENT OF CHANGES IN EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Total	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Common Stock [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Additional Paid-In Capital [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Accumulated Deficit [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Treasury Stock [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Total Stockholders' Equity [Member]	Consolidated Entity Excluding Variable Interest Entities (VIE) [Member] Noncontrolling Interests [Member]	VIE-RSO [Member]	VIE-RSO [Member] Noncontrolling Interests [Member]
Balance, beginning of period at Sep. 30, 2012	$ 711,419		$ 294	$ 285,844	$ (26,770)	$ (102,457)	$ (2,226)	$ 154,685	$ 208		$ 556,526
Balance, beginning of period (in shares) at Sep. 30, 2012			20,109,709
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	13,721				(1,534)			(1,534)	587		14,668
Issuance of common shares	1		1	0				1
Treasury shares issued (in shares)			6,872
Treasury shares issued	46			(26)		72		46
Stock-based compensation (in shares)			203,158
Stock-based compensation	230			230				230
Repurchases of common stock (in shares)			(164,007)
Repurchases of common stock	(1,087)		0			(1,087)		(1,087)
Cash dividends	(1,182)				(1,182)			(1,182)
Distributions	(516)							0	(516)		0
Other comprehensive income	5,854	29					29	29	0	5,825	5,825
Activity of consolidated VIE - RSO	5,304									5,304
Balance, end of period at Dec. 31, 2012	$ 733,790		$ 295	$ 286,048	$ (29,486)	$ (103,472)	$ (2,197)	$ 151,188	$ 279		$ 582,323
Balance, end of period (in shares) at Dec. 31, 2012			20,155,732