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FAIR VALUE MEASUREMENTS - Fair Values and Carrying Amounts (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Financial Assets
Marketable equity securities	$ 59,578	$ 56,638
Securities available for sale	1,410,078	1,399,647
Securities held to maturity	377,056	371,224
FHLB bank stock and restricted securities	59,356	77,344
Level 1
Financial Assets
Cash and cash equivalents	229,306	183,189
Trading security	0	0
Marketable equity securities	58,521	56,074
Securities available for sale	0	0
Securities held to maturity	0	0
Net loans	0	0
Loans held for sale	0	0
Accrued interest receivable	0	0
Cash surrender value of bank-owned life insurance policies	0
Derivative assets	0	0
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term Federal Home Loan Bank advances	0	0
Subordinated borrowings	0	0
Derivative liabilities	1,144	734
Level 2
Financial Assets
Cash and cash equivalents	0	0
Trading security	0	0
Marketable equity securities	1,057	564
Securities available for sale	1,410,078	1,399,647
Securities held to maturity	359,084	353,182
Net loans	0	0
Loans held for sale	191,548	96,233
Accrued interest receivable	41,864	36,879
Cash surrender value of bank-owned life insurance policies	227,458
Derivative assets	76,764	31,727
Financial Liabilities
Total deposits	10,576,006	8,970,321
Short-term debt	608,946	1,118,820
Long-term Federal Home Loan Bank advances	297,184	308,336
Subordinated borrowings	100,924	97,376
Derivative liabilities	79,731	33,239
Level 3
Financial Assets
Cash and cash equivalents	0	0
Trading security	11,210	11,212
Marketable equity securities	0	0
Securities available for sale	0	0
Securities held to maturity	17,972	18,042
Net loans	10,151,656	9,026,442
Loans held for sale	178,566	0
Accrued interest receivable	0	0
Cash surrender value of bank-owned life insurance policies	0
Derivative assets	9,005	3,927
Financial Liabilities
Total deposits	0	0
Short-term debt	0	0
Long-term Federal Home Loan Bank advances	0	0
Subordinated borrowings	0	0
Derivative liabilities	0	0
Carrying Amount
Financial Assets
Cash and cash equivalents	229,306	183,189
Trading security	11,210	11,212
Marketable equity securities	59,578	56,638
Securities available for sale	1,410,078	1,399,647
Securities held to maturity	364,463	373,763
FHLB bank stock and restricted securities	59,356	77,344
Net loans	9,879,672	8,981,784
Loans held for sale	367,692	96,233
Accrued interest receivable	41,864	36,879
Cash surrender value of bank-owned life insurance policies	227,458
Derivative assets	85,769	35,654
Financial Liabilities
Total deposits	10,565,956	8,982,381
Short-term debt	608,928	1,118,832
Long-term Federal Home Loan Bank advances	295,886	309,466
Subordinated borrowings	96,927	89,518
Derivative liabilities	80,875	33,973
Fair Value
Financial Assets
Cash and cash equivalents	229,306	183,189
Trading security	11,210	11,212
Marketable equity securities	59,578	56,638
Securities available for sale	1,410,078	1,399,647
Securities held to maturity	377,056	371,224
Net loans	10,151,656	9,026,442
Loans held for sale	370,114	96,233
Accrued interest receivable	41,864	36,879
Cash surrender value of bank-owned life insurance policies	227,458
Derivative assets	85,769	35,654
Financial Liabilities
Total deposits	10,576,006	8,970,321
Short-term debt	608,946	1,118,820
Long-term Federal Home Loan Bank advances	297,184	308,336
Subordinated borrowings	100,924	97,376
Derivative liabilities	$ 80,875	$ 33,973

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Fair value portion of borrowing from Federal Home Loan Bank (FHLBank).

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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