Reserve for Repurchased Loans and Loss Sharing Obligations - Analysis of Reserve for Repurchased Loans and Loss Sharing Obligations (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Disclosure Reserve For Repurchased Loans Analysis Of Reserve For Repurchased Loans [Abstract]
Balance at beginning of period	$ 1,468	$ 1,688	$ 1,468	$ 1,203
Provision charged to operations	0	0	0	975
Loss on loans repurchased, settlements or payments under loss sharing arrangements	(163)	0	(163)	(695)
Recoveries	0	0	0	205
Balance at end of period	$ 1,305	$ 1,688	$ 1,305	$ 1,688