Loans Receivable, Net - Analysis of Allowance for Loan Losses (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Receivables [Abstract]
Balance at beginning of period	$ 20,494	$ 18,241	$ 20,510	$ 18,230
Provision charged to operations	800	1,700	1,900	3,400
Charge-offs	(938)	(2,542)	(2,299)	(4,342)
Recoveries	464	258	709	369
Balance at end of period	$ 20,820	$ 17,657	$ 20,820	$ 17,657