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FAIR VALUES OF FINANCIAL INSTRUMENTS - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Mar. 31, 2016 | Dec. 31, 2015
--- | --- | ---
Financial assets |  |
Cash and cash equivalents | $ 215,012 | $ 156,124
Time deposits in financial institutions | 1,500 | 1,500
Securities available-for-sale | 1,663,711 | 833,596
Securities held-to-maturity | 948,458 | 932,285
Federal Home Loan Bank and other bank stock | 61,146 | 59,069
Loans held-for-sale | 870,444 | 672,850
Loans and leases receivable, net of ALLL | 5,543,044 | 5,244,251
Accrued interest receivable | 26,967 | 22,800
Derivative assets | 12,288 | 9,042
Financial liabilities |  |
Deposits | 6,592,249 | 6,010,606
Advances from Federal Home Loan Bank | 1,195,780 | 929,727
Securities sold under repurchase agreements | 257,100 |
Long term debt | 260,904 | 264,269
Derivative liabilities | 6,543 | 1,067
Accrued interest payable | 6,716 | 4,234
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Financial assets |  |
Cash and cash equivalents | 215,012 | 156,124
Time deposits in financial institutions | 1,500 | 1,500
Securities available-for-sale | 0 | 0
Securities held-to-maturity | 0 | 0
Federal Home Loan Bank and other bank stock | 0 | 0
Loans held-for-sale | 0 | 0
Loans and leases receivable, net of ALLL | 0 | 0
Accrued interest receivable | 26,967 | 22,800
Derivative assets | 0 | 0
Financial liabilities |  |
Deposits | 0 | 0
Advances from Federal Home Loan Bank | 0 | 0
Securities sold under repurchase agreements | 0 |
Long term debt | 0 | 0
Derivative liabilities | 0 | 0
Accrued interest payable | 6,716 | 4,234
Significant Other Observable Inputs (Level 2) |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Time deposits in financial institutions | 0 | 0
Securities available-for-sale | 1,663,711 | 833,596
Securities held-to-maturity | 948,458 | 932,285
Federal Home Loan Bank and other bank stock | 61,146 | 59,069
Loans held-for-sale | 843,864 | 654,559
Loans and leases receivable, net of ALLL | 0 | 0
Accrued interest receivable | 0 | 0
Derivative assets | 12,288 | 9,042
Financial liabilities |  |
Deposits | 0 | 0
Advances from Federal Home Loan Bank | 1,195,780 | 929,727
Securities sold under repurchase agreements | 257,100 |
Long term debt | 260,904 | 264,269
Derivative liabilities | 6,543 | 1,067
Accrued interest payable | 0 | 0
Significant Unobservable Inputs (Level 3) |  |
Financial assets |  |
Cash and cash equivalents | 0 | 0
Time deposits in financial institutions | 0 | 0
Securities available-for-sale | 0 | 0
Securities held-to-maturity | 0 | 0
Federal Home Loan Bank and other bank stock | 0 | 0
Loans held-for-sale | 26,580 | 18,291
Loans and leases receivable, net of ALLL | 5,543,044 | 5,244,251
Accrued interest receivable | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Deposits | 6,592,249 | 6,010,606
Advances from Federal Home Loan Bank | 0 | 0
Securities sold under repurchase agreements | 0 |
Long term debt | 0 | 0
Derivative liabilities | 0 | 0
Accrued interest payable | 0 | 0
Carrying Value |  |
Financial assets |  |
Cash and cash equivalents | 215,012 | 156,124
Time deposits in financial institutions | 1,500 | 1,500
Securities available-for-sale | 1,663,711 | 833,596
Securities held-to-maturity | 962,262 | 962,203
Federal Home Loan Bank and other bank stock | 61,146 | 59,069
Loans held-for-sale | 863,944 | 668,841
Loans and leases receivable, net of ALLL | 5,427,223 | 5,148,861
Accrued interest receivable | 26,967 | 22,800
Derivative assets | 12,288 | 9,042
Financial liabilities |  |
Deposits | 6,837,601 | 6,303,085
Advances from Federal Home Loan Bank | 1,195,000 | 930,000
Securities sold under repurchase agreements | 257,100 |
Long term debt | 260,896 | 261,876
Derivative liabilities | 6,543 | 1,067
Accrued interest payable | $ 6,716 | $ 4,234

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