Acquisition - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	May 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Business Acquisition [Line Items]
Payment for all outstanding shares of acquired entity in cash	$ 39,200,000
Payment for all outstanding shares of acquired entity by shares	420,000
Date of acquisition agreement		Feb. 09, 2013
Fair value of purchased credit impaired loans		24,710,000	27,926,000	22,509,000
Contractual amounts		3,844,000	3,970,000	0
Orange Savings Bank [Member]
Business Acquisition [Line Items]
Payment for all outstanding shares of acquired entity in cash	39,200,000
Fair value of total loans		293,288,000
Total loans of contractual amounts		299,252,000
Fair value of purchased credit impaired loans		4,475,000
Contractual amounts		$ 5,878,000