Parent Company Information - Schedule of Condensed Statements of Financial Condition (Parenthetical) (Detail) (VNB Capital Trust I [Member], USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
VNB Capital Trust I [Member]
Junior subordinated debentures issued to capital trusts, fair value	$ 147,595	$ 160,478