FAIR VALUE MEASUREMENTS (Details 3) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	$ 477,507	$ 375,453
Loans and Leases Receivable, Net Amount	5,491,896	4,915,633
Securities held to maturity, fair value	478,749	379,699
Liabilities, Fair Value Disclosure [Abstract]
Advances from Federal Home Loan Banks	102,080	70,080
Customer Repurchase Agreements and other short-term borrowings	133,958	147,890
Wholesale Repurchase Agreements	0	50,000
Junior subordinated debentures	73,464	73,685
Subordinated Debt	35,000	65,000
Bank Time Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Financial Liabilities Book Value	684,830	649,620
Accrued Liabilities, Fair Value Disclosure	684,370	651,180
Federal Home Loan Bank Advances [Member]
Liabilities, Fair Value Disclosure [Abstract]
Advances from Federal Home Loan Banks	102,080	70,080
Accrued Liabilities, Fair Value Disclosure	102,396	70,208
Customer Repurchase Agreements [Member]
Liabilities, Fair Value Disclosure [Abstract]
Customer Repurchase Agreements and other short-term borrowings	133,958	147,890
Accrued Liabilities, Fair Value Disclosure	133,958	147,890
Wholesaled And Customer Repurchase Agreements [Member]
Liabilities, Fair Value Disclosure [Abstract]
Wholesale Repurchase Agreements		50,000
Accrued Liabilities, Fair Value Disclosure		50,510
Junior Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Junior subordinated debentures	73,464	73,685
Accrued Liabilities, Fair Value Disclosure	74,029	70,045
Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Subordinated Debt	35,000	65,000
Accrued Liabilities, Fair Value Disclosure	34,781	64,198
Significant Other Observable Inputs (Level 2) [Member] \| Bank Time Deposits [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure	684,370	651,180
Significant Other Observable Inputs (Level 2) [Member] \| Federal Home Loan Bank Advances [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure	102,396	70,208
Significant Other Observable Inputs (Level 2) [Member] \| Junior Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure	74,029	70,045
Significant Unobservable Inputs (Level 3) [Member] \| Customer Repurchase Agreements [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure	133,958	147,890
Significant Unobservable Inputs (Level 3) [Member] \| Wholesaled And Customer Repurchase Agreements [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure		50,510
Significant Unobservable Inputs (Level 3) [Member] \| Subordinated Debt [Member]
Liabilities, Fair Value Disclosure [Abstract]
Accrued Liabilities, Fair Value Disclosure	34,781	64,198
US Treasury Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	1,009	1,010
Securities held to maturity, fair value	1,064	1,073
US Treasury Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	1,064	1,073
Agency mortgage-backed securities
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	167,134	159,522
Securities held to maturity, fair value	170,375	164,944
Agency mortgage-backed securities \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	170,375	164,944
Agency collateralized mortgage obligations
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	267,348	198,220
Securities held to maturity, fair value	264,891	196,584
Agency collateralized mortgage obligations \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	264,891	196,584
State, county, and municipal securities
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	225	424
Securities held to maturity, fair value	227	428
State, county, and municipal securities \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	227	428
Single issuer trust preferred securities issued by banks and insurers
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	1,500	1,500
Securities held to maturity, fair value	1,522	1,477
Single issuer trust preferred securities issued by banks and insurers \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	1,522	1,477
Small Business Administration Pooled Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	35,291	9,775
Securities held to maturity, fair value	35,664	10,074
Small Business Administration Pooled Securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	0	0
Small Business Administration Pooled Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	35,664	10,074
Small Business Administration Pooled Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	0	0
Corporate Debt Securities [Member]
Assets, Fair Value Disclosure [Abstract]
Held-to-maturity Securities	5,000	5,002
Securities held to maturity, fair value	5,006	5,119
Corporate Debt Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
Assets, Fair Value Disclosure [Abstract]
Securities held to maturity, fair value	5,006	5,119
Loans Net Of Allowance For Loan Loses [Member]
Assets, Fair Value Disclosure [Abstract]
Loans and Leases Receivable, Net Amount	5,491,896	4,907,437
Loans, net of allowance for loan losses	5,422,023	4,875,283
Loans Net Of Allowance For Loan Loses [Member] \| Significant Unobservable Inputs (Level 3) [Member]
Assets, Fair Value Disclosure [Abstract]
Loans, net of allowance for loan losses	$ 5,422,023	$ 4,875,283

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Financial liabilities book value.

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The amount of securities that an institution sells and agrees to repurchase at a specified date for a specified price, net of any reductions or offsets with 3rd party brokers.

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- Definition

Fair value portion of accrued expenses.

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-Publisher FASB
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-SubTopic 10
-Section S99
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Amount of borrowings as of the balance sheet date from the Federal Home Loan Bank, which are primarily used to cover shortages in the required reserve balance and liquidity shortages.

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Amount after other than temporary impairment (OTTI) accretion, of investments in debt securities classified as held-to-maturity.

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Fair value of investments in debt securities classified as held-to-maturity.

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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 after allowance and deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements and loans held for sale.

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Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts.

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Including the current and noncurrent portions, carrying value as of the balance sheet date of subordinated debt (with initial maturities beyond one year or beyond the operating cycle if longer). Subordinated debt places a lender in a lien position behind debt having a higher priority of repayment in liquidation of the entity's assets.

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