Commitments and Contingencies - (Reserve For Unfunded Credit Commitments) (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Reserve For Unfunded Credit Commitments [Roll Forward]
Beginning balance	$ 5,662	$ 5,449	$ 9,378
Provision	64	723	209
Reserve release	(1,342)	(510)	(4,138)
Ending balance	$ 4,384	$ 5,662	$ 5,449