Business Combination - Additional Information (Detail) (USD $) In Millions, except Share data, unless otherwise specified				0 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013 SCB Bancorp [Member]	Apr. 03, 2014 SCB Bancorp [Member] Subsequent Event [Member]
Business Combination Transactions [Line Items]
Exchange ratio per share to SCB shareholder				$ 0.4904
Cash paid for each share to SCB shareholder				$ 5.15
Market closing price per share				$ 22.23
Estimated transaction value				$ 18.9
Common stock outstanding	8,630,966	8,630,966		1,164,442
Common stock issued				570,820
Reported total assets of acquiree			154.1
Total deposits held by acquiree			119.3
Total loans of acquiree			$ 130.9