Reserve for Repurchased Loans and Loss Sharing Obligations - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
	Mar. 31, 2014 SecurityLoan	Mar. 31, 2013 Investor	Dec. 31, 2013 SecurityLoan	Dec. 31, 2012
Loans 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	$ 1,468,000	$ 1,688,000	$ 1,468,000	$ 1,203,000
Increase in reserve for repurchased loans and loss sharing obligations		485,000
General provision for repurchased loans		975,000
Additional provision on FHLB loan sales		875,000
Incurred losses on loans		245,000
Reserve reduced by cash paid as part of settlement		450,000
Number of investors in comprehensive settlement		1
Recoveries from previous charge-off		205,000
Outstanding number of loan repurchase requests	5		5
Principal balance on loans repurchase	1,200,000		1,200,000
Repurchase Requests [Member]
Loans Receivable [Line Items]
General provision for repurchased loans		$ 100,000