Business Combination - Summary of Changes in Contingent Consideration (Detail) (Meridian [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Meridian [Member]
Loans At Acquisition Date [Line Items]
Beginning Balance		$ 231	$ 1,300
Additions/ (Payments) (In
Changes in Fair Value of Contingent Consideration Thousands)		(231)	(1,069)
Ending Balance			$ 231