BORROWINGS, Outstanding Borrowings (Details) - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
BORROWINGS [Abstract]
FHLB overnight advance	$ 24,000	$ 146,200
Subordinated debt held by unconsolidated subsidiary trusts, net of discount of $332 and $357, respectively	122,814	102,170
Securities sold under agreement to repurchase, short term	337,011	0
FHLB Long term advances	2,071	0
Total borrowings	485,896	248,370
Subordinated debt held by unconsolidated subsidiary trust, discount	$ 332	$ 357

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Amount, after accumulated amortization, of debt discount (premium).

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Including both current and noncurrent portions, Federal Home Loan Bank borrowings initially due beyond one year or beyond the normal operating cycle if longer.

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Amount of advances from Federal Home Loan Bank (FHLBank) maturing in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Including the current and noncurrent portions, the carrying value of junior subordinated long-term debt owed to unconsolidated subsidiary trusts as of the balance sheet date. Such debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets and was initially scheduled to be repaid after one year or beyond the normal operating cycle if longer.

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Amount of long-term debt and capital lease obligations including current maturities.

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Amount, after the effects of master netting arrangements, of funds outstanding borrowed in the form of a security repurchase agreement between the entity and another party for the sale and repurchase of identical or substantially the same securities at a date certain for a specified price. Includes liabilities not subject to a master netting arrangement and not elected to be offset.

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