Loans - Additional Information (Detail) (USD $)	Jun. 30, 2014	Dec. 31, 2013	May 01, 2013	Dec. 31, 2012
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired at fair values		$ 4,900,000	$ 4,900,000
Past Due and Accruing 30-59 days	614,000	385,000
Past Due and Accruing 60-89 days	126,000	61,000
Non-accrual	1,310,000	1,489,000
Past Due and Accruing 90 or more days
Loans classified as doubtful or loss	0	0
Unpaid principal balances of loans sold to and serviced for others	126,200,000	59,800,000
Loan outstanding to related parties	13,429,000	11,781,000		10,969,000
Performing Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired at fair values			72,600,000
FCB and SLBB Acquisitions [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans acquired at fair values	53,900,000	64,800,000
Past Due and Accruing 30-59 days	500,000	200,000
Past Due and Accruing 60-89 days	0	34,000,000
Non-accrual	900,000	1,200,000
Past Due and Accruing 90 or more days	$ 0	$ 0