BORROWINGS, Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Debt Instrument [Line Items]
Total borrowings	$ 248,370	$ 403,446
Subordinated debt held by unconsolidated subsidiary trust, discount	357	381
Federal Home Loan Bank Overnight Advance [Member]
Debt Instrument [Line Items]
Total borrowings	146,200	301,300
Subordinated Debt Held By Unconsolidated Subsidiary Trust [Member]
Debt Instrument [Line Items]
Total borrowings	$ 102,170	$ 102,146