Loans and Leases - Summary of Major Loan and Lease Categories (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	$ 1,751,558	$ 1,626,625
Total Loans and Leases Held for Investment, Acquired	356,299
Total Loans and Leases Held for Investment	2,107,857	1,626,625	$ 1,586,994
Unearned Lease Income, Originated	(13,561)	(14,131)
Unearned Lease Income, Acquired	0
Unearned lease income, included in the above table	(13,561)
Net deferred costs, Originated	3,285	3,218
Net deferred costs, Acquired	0
Net deferred costs, included in the above table	3,285
Overdraft Deposits, Originated	75	50
Overdraft Deposits, Acquired	0
Overdraft deposits included in the above table	75
Commercial, Financial and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	484,776	457,827
Total Loans and Leases Held for Investment, Acquired	27,184
Total Loans and Leases Held for Investment	511,960	457,827	447,993
Real Estate-Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	685,024	628,478
Total Loans and Leases Held for Investment, Acquired	134,911
Total Loans and Leases Held for Investment	819,935	628,478
Real Estate-Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	91,956	79,887
Total Loans and Leases Held for Investment, Acquired	41,693
Total Loans and Leases Held for Investment	133,649	79,887
Real Estate-Residential Secured for Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	51,923	36,932
Total Loans and Leases Held for Investment, Acquired	135,971
Total Loans and Leases Held for Investment	187,894	36,932	35,284
Real Estate-Residential Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	172,721	166,850
Total Loans and Leases Held for Investment, Acquired	4,234
Total Loans and Leases Held for Investment	176,955	166,850
Real Estate-Home Equity Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	116,491	108,250
Total Loans and Leases Held for Investment, Acquired	11,961
Total Loans and Leases Held for Investment	128,452	108,250
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	28,070	29,941
Total Loans and Leases Held for Investment, Acquired	345
Total Loans and Leases Held for Investment	28,415	29,941	31,564
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	120,597	118,460
Total Loans and Leases Held for Investment, Acquired	0
Total Loans and Leases Held for Investment	$ 120,597	$ 118,460	$ 108,126