Reserve for Repurchased Loans and Loss Sharing Obligations - Additional Information (Detail) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2014	Jun. 30, 2013 Investor	Jun. 30, 2014 SecurityLoan	Jun. 30, 2013 Investor	Dec. 31, 2013 SecurityLoan	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans sold to FHLB under loss sharing arrangement first loss position			1.00%
Loans sold to FHLB under loss sharing arrangement minimum exposure			1.50%
Loans sold to FHLB under loss sharing arrangement maximum loss position			4.00%
Reserve for repurchased loans and loss sharing obligations	$ 1,305,000	$ 1,688,000	$ 1,305,000	$ 1,688,000	$ 1,468,000	$ 1,468,000	$ 1,688,000	$ 1,203,000
Increase in reserve for repurchased loans and loss sharing obligations			163,000	485,000
General provision for repurchased loans	0	0	0	975,000
Additional provision on FHLB loan sales			143,000	875,000
Incurred losses on loans				245,000
Reserve reduced by cash paid as part of settlement			20,000	450,000
Number of investors in comprehensive settlement		1		1
Recoveries from previous charged-off	0	0	0	205,000
Outstanding number of loan repurchase requests			1		5
Principal balance on loans repurchase	252,000		252,000		1,200,000
Repurchase Requests [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
General provision for repurchased loans				$ 100,000