Reduction in cash due to no longer including the former subsidiary's cash in the consolidated entity's cash.

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Discontinued Operations - Additional Information (Detail) - USD ($) $ in Thousands		3 Months Ended			6 Months Ended
	Mar. 31, 2016	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]
Proceeds from divestiture of business, net of cash divested					$ 0		$ 106,041
Discontinued Operations, Disposed of by Sale \| Tax Lien Business \| Propel
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash consideration	$ 144,400			$ 144,400
Proceeds from divestiture of business, net of cash divested	106,000
Divestiture of cash	$ 38,400
Loss on sale of discontinued operations, net of tax		$ 0	$ 0	$ 3,000	$ 322	$ (2,000)	$ 3,000