Goodwill and Identifiable Intangible Assets - Schedule of Changes in Carrying Amount of Goodwill by Reporting Unit (Parenthetical) (Detail) (Tax lien business [Member], USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013
Tax lien business [Member]
Goodwill [Line Items]
Goodwill adjustment	$ (4,009)