LOANS - Risk Category, Class of Loans and Recorded Investment (Details) - USD ($) $ in Thousands	Jun. 30, 2017		Dec. 31, 2016
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 3,330,075		$ 2,879,536
Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	230,574		160,116
Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,464,068		1,357,592
Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	991,144		836,787
Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	465,138		370,589
Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	179,151		154,452
Pass [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,240,615		2,797,806
Pass [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	216,965		148,563
Pass [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,426,634		1,319,696
Pass [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	965,708		811,576
Pass [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	453,838		364,241
Pass [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	177,470		153,730
Special mention [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	30,062		28,017
Special mention [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	8,048		5,037
Special mention [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	12,562		17,184
Special mention [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,705		1,780
Special mention [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	6,715		3,949
Special mention [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	1,032		67
Substandard [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	25,418		17,931
Substandard [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,631		5,497
Substandard [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	13,364		7,438
Substandard [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,274		2,709
Substandard [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	3,981		2,153
Substandard [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	168		134
Doubtful [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	60	[1]	0
Doubtful [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	[1]	0
Doubtful [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	[1]	0
Doubtful [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	[1]	0
Doubtful [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	60	[1]	0
Doubtful [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0	[1]	0
Nonaccrual [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	16,979		18,071
Nonaccrual [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	669		470
Nonaccrual [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	5,713		7,341
Nonaccrual [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,117		9,844
Nonaccrual [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	347		246
Nonaccrual [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	133		170
Pass-Troubled debt restructures [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,946		5,434
Pass-Troubled debt restructures [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	37		44
Pass-Troubled debt restructures [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	4,909		4,988
Pass-Troubled debt restructures [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0		358
Pass-Troubled debt restructures [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0		0
Pass-Troubled debt restructures [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	0		44
Troubled debt restructures [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	11,995		12,277
Troubled debt restructures [Member] | Construction & Land Development [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	224		505
Troubled debt restructures [Member] | Commercial Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	886		945
Troubled debt restructures [Member] | Residential Real Estate [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	10,340		10,520
Troubled debt restructures [Member] | Commercial and Financial [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	197		0
Troubled debt restructures [Member] | Consumer [Member]
Financing Receivable, Recorded Investment [Line Items]
Loans	$ 348		$ 307

[1] Comprised of a single loan that paid off in July 2017.