Loans and Loans Held for Sale - Summary of Nonperforming Assets of Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014 Contract	Mar. 31, 2013 Contract
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	3
Recorded Investment	$ 72	$ 136
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0
Recorded Investment	0	0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0
Recorded Investment	0	0
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0
Recorded Investment	0	0
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	1	1
Recorded Investment	72	18
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	2
Recorded Investment	$ 0	$ 118