LOANS AND ALLOWANCE FOR LOAN LOSSES - NON-PCI LOANS ON NONACCRUAL STATUS AND PAST DUE OVER 90 DAYS STILL ACCRUING (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	$ 31,200	$ 21,194
Loans greater than 90 days past due and accruing	920	552
Commercial real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	6,903	6,130
Loans greater than 90 days past due and accruing	0	0
Commercial and industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	12,916	4,126
Loans greater than 90 days past due and accruing	187	552
Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	805	468
Loans greater than 90 days past due and accruing	691	0
Residential real estate
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	5,499	5,353
Loans greater than 90 days past due and accruing	0	0
Construction and development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	58	1,324
Loans greater than 90 days past due and accruing	0	0
Home equity
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	4,731	3,245
Loans greater than 90 days past due and accruing	0	0
Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Nonaccrual	288	548
Loans greater than 90 days past due and accruing	$ 42	$ 0