Loans and Leases - Summary of Major Loan and Lease Categories (Details) - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015	Jun. 30, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	$ 2,088,221	$ 1,883,563
Total Loans and Leases Held for Investment, Acquired	256,816	295,450
Total Loans and Leases Held for Investment	2,345,037	2,179,013	$ 2,107,857
Unearned Lease Income, Originated	(14,539)	(13,829)
Unearned Lease Income, Acquired	0	0
Unearned lease income, included in the above table	(14,539)	(13,829)
Net deferred costs, Originated	4,987	4,244
Net deferred costs, Acquired	0	0
Net deferred costs, included in the above table	4,987	4,244
Overdraft Deposits, Originated	72	35
Overdraft Deposits, Acquired	0	0
Overdraft deposits included in the above table	72	35
Commercial, Financial and Agricultural [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	559,364	479,980
Total Loans and Leases Held for Investment, Acquired	20,096	24,535
Total Loans and Leases Held for Investment	579,460	504,515	511,960
Real Estate-Commercial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	813,925	759,342
Total Loans and Leases Held for Investment, Acquired	113,033	126,550
Total Loans and Leases Held for Investment	926,958	885,892
Real Estate-Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	97,967	91,904
Total Loans and Leases Held for Investment, Acquired	2,112	4,637
Total Loans and Leases Held for Investment	100,079	96,541
Real Estate-Residential Secured for Business Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	122,373	94,280
Total Loans and Leases Held for Investment, Acquired	107,849	124,503
Total Loans and Leases Held for Investment	230,222	218,783	187,894
Real Estate-Residential Secured for Personal Purpose [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	200,746	177,850
Total Loans and Leases Held for Investment, Acquired	3,085	3,305
Total Loans and Leases Held for Investment	203,831	181,155
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	134,170	125,361
Total Loans and Leases Held for Investment, Acquired	10,335	11,594
Total Loans and Leases Held for Investment	144,505	136,955
Loans to Individuals [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	30,880	29,406
Total Loans and Leases Held for Investment, Acquired	306	326
Total Loans and Leases Held for Investment	31,186	29,732	28,415
Lease Financings [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Loans and Leases Held for Investment, Originated	128,796	125,440
Total Loans and Leases Held for Investment, Acquired	0	0
Total Loans and Leases Held for Investment	$ 128,796	$ 125,440	$ 120,597