Premises, Furniture, and Equipment (Detail) - Rental Expense (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Property, Plant and Equipment [Abstract]
Rental expense charged to operations	$ 3,123	[1]	$ 3,379	[1]	$ 4,193	[1]
Rental income from premises leased to others	$ 531	[2]	$ 931	[2]	$ 1,136	[2]

[1] Includes amounts paid under short-term cancelable leases and included in net occupancy and equipment expense in the Consolidated Statements of Income.

[2] Included as a reduction to net occupancy and equipment expense in the Consolidated Statements of Income.