Loans and Loans Held for Sale - Summary of Nonperforming Assets of Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013 Contract	Dec. 31, 2012 Contract
Financing Receivable, Modifications [Line Items]
Number of Defaults	17
Recorded Investment	$ 1,313
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1
Recorded Investment	75
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	2
Recorded Investment	438
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults
Recorded Investment
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	8
Recorded Investment	607
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	6
Recorded Investment	$ 193