Deferred Court Costs, Net - Schedule of Deferred Court Costs (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Deferred Costs Capitalized Prepaid And Other Assets Disclosure [Abstract]
Court costs advanced	$ 334,760		$ 279,314
Court costs recovered	(118,610)		(94,827)
Court costs reserve	(176,094)	(162,500)	(149,080)	(132,780)	(129,287)	(130,454)
Deferred court costs, net	$ 40,056		$ 35,407