Premises and Equipment - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Property Branch	Dec. 31, 2012	Dec. 31, 2011
Property Plant And Equipment [Abstract]
Number of properties sold	3
Number of branches closed	2
Book value of properties	$ 6,270
Net proceeds from sale of properties	6,411
Impairment on leasehold improvements	975
Depreciation and amortization expense	$ 3,385	$ 3,926	$ 3,968