LOAN SERVICING - SBA Servicing Asset (Details) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Servicing Assets at Fair Value [Line Items]
Government-guaranteed lending	$ 12,729,000	$ 9,450,000	$ 5,586,000
Mortgage Loan Servicing
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance	563,802,000	455,033,000
Mortgage servicing fees	1,272,000	538,000	0
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	4,284,000	0
Fair value of acquired MSRs	0	4,025,000
Additions	1,881,000	688,000
Payoffs	(402,000)	(126,000)
Amortization	(726,000)	(303,000)
Ending balance	5,037,000	4,284,000	0
Valuation allowance	(10,000)	(157,000)
Balance at end of period after valuation allowance	5,027,000	4,127,000
SBA Loans
Servicing Assets at Fair Value [Line Items]
Unpaid principal balance	205,879,000	136,093,000
Government-guaranteed lending	1,758,000	1,063,000	522,000
Servicing Asset at Fair Value, Amount [Roll Forward]
Beginning balance	3,081,000	1,759,000
Additions	2,148,000	1,628,000
Amortization	(744,000)	(306,000)
Ending balance	4,485,000	3,081,000	$ 1,759,000
Valuation allowance	$ 0	$ 0