Other Income - Summary of Other Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Other Income And Expenses [Abstract]
Servicing income	$ 547	$ 499	$ 399
Prepayment fees	418	279	118
Loan related income	165	221	196
Income from retained interests in transferred assets	162	189	215
Other	100	92	127
Other income	$ 1,392	$ 1,280	$ 1,055