Discontinued Operations - Schedule of the Components of Discontinued Operations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
General and administrative expenses	$ 4,048	$ 3,991	$ 9,512	$ 6,314
Income (loss) from discontinued operations		51		(863)
Discontinued Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Servicing fees		2,206		5,591
Management fees from affiliates		1,546		4,741
Total revenues		3,752		10,332
General and administrative expenses		3,150		9,879
Income from discontinued operations before income taxes		602		453
Income tax provision		(550)		(1,316)
Income (loss) from discontinued operations		$ 51		$ (863)