Goodwill and Identifiable Intangible Assets - Summary of Acquired Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 119,788	$ 55,446
Trade name and other [Member]
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	2,060	570
Accumulated Amortization	(126)	(83)
Net Carrying Amount	1,934	487
Goodwill - portfolio purchasing and recovery [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	74,398	6,047
Goodwill - tax lien business [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	45,390	49,399
Other intangibles [Member]
Finite-Lived Intangible Assets [Line Items]
Goodwill	$ 1,900