Other Intangible Assets - Intangible Amortization Expense (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Intangible amortization expense
Identified intangible assets Deposit base	$ 783	$ 788	$ 847
Deposit Base [Member]
Intangible amortization expense
Identified intangible assets Deposit base	$ 783	$ 788	$ 847