Other Comprehensive Income (Loss) - Summary of Reclassification Out of Each Component of Accumulated Comprehensive Income (Loss) (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Equity [Abstract]
Amounts reclassified from accumulated other comprehensive income, Total	$ (31)	$ (1,857)	$ (34)	$ (2,578)
Realized net gains on the sale of available for sale securities, tax expense (benefit)	11		12
Realized net gains on the sale of available for sale securities, gains on securities available for sale, net of tax	(20)	(1,857)	(22)	(2,578)
Total reclassification during the period	$ (20)	$ (1,857)	$ (22)	$ (2,578)