Long-Term Borrowings and Subordinated Debt - Schedule of Long-Term Borrowings, Interest Expense and Weighted Average Interest Rate (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Debt Disclosure [Abstract]
Long-term borrowings	$ 21,810	$ 34,101	$ 31,874
Weighted average interest rate	3.01%	3.17%	3.40%
Interest expense	$ 746	$ 1,107	$ 1,091