Discontinued Operations - Revenue and Components of Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total income (loss) from discontinued operations, net of tax	$ 0		$ 1,661	$ (3,182)	$ 3,541
Tax Lien Business [Member] | Propel [Member] | Discontinued Operations, Disposed of by Sale [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0		7,694	4,950	15,575
Salaries and employee benefits	0		(1,976)	(2,860)	(4,172)
Other operating expenses	0		(1,280)	(1,473)	(2,188)
General and administrative expenses	0		(1,528)	(1,551)	(2,943)
Depreciation and amortization	0		(206)	(127)	(419)
Income (loss) from discontinued operations, before income taxes	0		2,704	(1,061)	5,853
Loss on sale of discontinued operations, before income taxes	0	$ (3,000)	0	(3,000)	0
Total income (loss) on discontinued operations, before income taxes	0		2,704	(4,061)	5,853
Income tax (provision) benefit	0		(1,043)	879	(2,312)
Total income (loss) from discontinued operations, net of tax	$ 0		$ 1,661	$ (3,182)	$ 3,541