LOANS AND ALLOWANCE FOR LOAN LOSSES - Aging Analysis of the Recorded Investment in Past Due Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	$ 3,909	$ 4,268
Nonaccrual Loans	19,315	15,788
Current Loans	1,963,214	1,871,579
Total loans evaluated for impairment	1,986,438	1,891,635
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	1,499	1,939
Nonaccrual Loans	8,933	3,896
Current Loans	414,722	410,917
Total loans evaluated for impairment	425,154	416,752
Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Nonaccrual Loans	0	0
Current Loans	64,132	67,038
Total loans evaluated for impairment	64,132	67,038
Real estate | Commercial real estate (including multi-family residential)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	1,747	1,661
Nonaccrual Loans	9,726	11,663
Current Loans	949,739	878,665
Total loans evaluated for impairment	961,212	891,989
Real estate | Commercial real estate construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	130	263
Nonaccrual Loans	70	0
Current Loans	175,064	158,984
Total loans evaluated for impairment	175,264	159,247
Real estate | 1-4 family residential (including home equity)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	198	280
Nonaccrual Loans	574	217
Current Loans	250,109	246,490
Total loans evaluated for impairment	250,881	246,987
Real estate | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	248	0
Nonaccrual Loans	0	0
Current Loans	99,400	98,657
Total loans evaluated for impairment	99,648	98,657
Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	87	125
Nonaccrual Loans	12	12
Current Loans	10,048	10,828
Total loans evaluated for impairment	10,147	10,965
Financing Receivables, 30 to 89 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	3,909	3,357
Financing Receivables, 30 to 89 Days Past Due | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	1,499	1,028
Financing Receivables, 30 to 89 Days Past Due | Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, 30 to 89 Days Past Due | Real estate | Commercial real estate (including multi-family residential)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	1,747	1,661
Financing Receivables, 30 to 89 Days Past Due | Real estate | Commercial real estate construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	130	263
Financing Receivables, 30 to 89 Days Past Due | Real estate | 1-4 family residential (including home equity)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	198	280
Financing Receivables, 30 to 89 Days Past Due | Real estate | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	248	0
Financing Receivables, 30 to 89 Days Past Due | Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	87	125
Financing Receivables, Equal to Greater than 90 Days Past Due
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	911
Financing Receivables, Equal to Greater than 90 Days Past Due | Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	911
Financing Receivables, Equal to Greater than 90 Days Past Due | Mortgage warehouse
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Real estate | Commercial real estate (including multi-family residential)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Real estate | Commercial real estate construction and land development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Real estate | 1-4 family residential (including home equity)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Real estate | Residential construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	0	0
Financing Receivables, Equal to Greater than 90 Days Past Due | Consumer and other
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans Past Due and Still Accruing	$ 0	$ 0