Discontinued Operations - Revenue and Components of Discontinued Operations (Detail) - USD ($) $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Mar. 31, 2016	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Total loss from discontinued operations, net of tax	$ 0	$ 0		$ (199)		$ (3,182)
Tax Lien Business | Propel | Discontinued Operations, Disposed of by Sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0	0		0		4,950
Salaries and employee benefits	0	0		0		(2,860)
Other operating expenses	0	0		0		(1,473)
General and administrative expenses	0	0		0		(1,551)
Depreciation and amortization	0	0		0		(127)
Loss from discontinued operations, before income taxes	0	0		0		(1,061)
Loss on sale of discontinued operations, before income taxes	0	0	$ (3,000)	(322)	$ 2,000	(3,000)
Total loss on discontinued operations, before income taxes	0	0		(322)		(4,061)
Income tax benefit	0	0		123		879
Total loss from discontinued operations, net of tax	$ 0	$ 0		$ (199)		$ (3,182)