Fair Value Measurements (Foreclosed Assets Remeasured and Reported at Fair Value) (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value	$ 11,900	$ 15,500
Foreclosed Assets Remeasured at Initial Recognition [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of foreclosed assets prior to remeasurement	7,580	9,428	24,682
Charge-offs recognized in the allowance for loan losses	(710)	(1,611)	(3,556)
Fair value	6,870	7,817	21,126
Foreclosed Assets Remeasured Subsequent to Initial Recognition [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of foreclosed assets prior to remeasurement	4,979	12,126	7,667
Write-downs included in other non-interest expense	(895)	(2,093)	(2,792)
Fair value	$ 4,084	$ 10,033	$ 4,875