Selected Components of Other Non-Interest Income And Other Non-Interest Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Letter of credit fees	$ 881	$ 992	$ 1,123
Extension fees	558	590	406
Other income	5,260	3,140	2,515
Total other non-interest income	6,699	4,722	4,044
Professional fees	4,479	6,309	4,942
Other real estate owned	(303)	905	2,412
Postage and delivery	1,299	1,255	1,257
Communications	1,606	1,596	1,433
Other expenses	9,129	8,348	7,598
Total other non-interest expense	$ 16,210	$ 18,413	$ 17,642