Loans and Loans Held for Sale - Summary of Nonperforming Assets of Defaulted TDRs (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract	Jun. 30, 2014 Contract	Jun. 30, 2013 Contract
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	4	1	7
Recorded Investment	$ 0	$ 79	$ 72	$ 215
Commercial Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0	0	0
Recorded Investment	0	0	0	0
Commercial and Industrial [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0	0	0
Recorded Investment	0	0	0	0
Commercial Construction [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	0	0	0
Recorded Investment	0	0	0	0
Residential Real Estate [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	2	1	3
Recorded Investment	0	46	72	64
Home Equity [Member]
Financing Receivable, Modifications [Line Items]
Number of Defaults	0	2	0	4
Recorded Investment	$ 0	$ 33	$ 0	$ 151