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FAIR VALUES OF FINANCIAL INSTRUMENTS - Carrying Amounts and Estimated Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Financial assets |  |
Cash and cash equivalents | $ 156,124 | $ 231,199
Time deposits in financial institutions | 1,500 | 1,900
Securities available-for-sale | 833,596 | 345,695
Securities held-to-maturity | 932,285 | 0
FHLB and other bank stock | 59,069 | 42,241
Loans held-for-sale | 672,850 | 1,195,834
Loans and leases receivable, net of allowance | 5,244,251 | 4,045,465
Accrued interest receivable | 22,800 | 15,113
Derivative assets | 9,042 | 6,379
Financial liabilities |  |
Deposits | 6,010,606 | 4,575,264
Advances from Federal Home Loan Bank | 929,727 | 633,083
Long term debt | 264,269 | 100,788
Derivative liabilities | 1,067 | 3,235
Accrued interest payable | 4,234 | 2,044
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Financial assets |  |
Cash and cash equivalents | 156,124 | 231,199
Time deposits in financial institutions | 1,500 | 1,900
Securities available-for-sale | 0 | 0
Securities held-to-maturity | 0 |
FHLB and other bank stock | 0 | 0
Loans held-for-sale | 0 | 0
Loans and leases receivable, net of allowance | 0 | 0
Accrued interest receivable | 22,800 | 15,113
Derivative assets | 0 | 0
Financial liabilities |  |
Deposits | 0 | 0
Advances from Federal Home Loan Bank | 0 | 0
Long term debt | 0 | 0
Derivative liabilities | 0 | 0
Accrued interest payable | 4,234 | 2,044
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 | 833,596 | 345,695
Securities held-to-maturity | 932,285 |
FHLB and other bank stock | 59,069 | 42,241
Loans held-for-sale | 654,559 | 1,195,834
Loans and leases receivable, net of allowance | 0 | 0
Accrued interest receivable | 0 | 0
Derivative assets | 9,042 | 6,379
Financial liabilities |  |
Deposits | 0 | 0
Advances from Federal Home Loan Bank | 929,727 | 633,083
Long term debt | 264,269 | 100,788
Derivative liabilities | 1,067 | 3,235
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 |
FHLB and other bank stock | 0 | 0
Loans held-for-sale | 18,291 | 0
Loans and leases receivable, net of allowance | 5,244,251 | 4,045,465
Accrued interest receivable | 0 | 0
Derivative assets | 0 | 0
Financial liabilities |  |
Deposits | 6,010,606 | 4,575,264
Advances from Federal Home Loan Bank | 0 | 0
Long term debt | 0 | 0
Derivative liabilities | 0 | 0
Accrued interest payable | 0 | 0
Carrying Value |  |
Financial assets |  |
Cash and cash equivalents | 156,124 | 231,199
Time deposits in financial institutions | 1,500 | 1,900
Securities available-for-sale | 833,596 | 345,695
Securities held-to-maturity | 962,203 |
FHLB and other bank stock | 59,069 | 42,241
Loans held-for-sale | 668,841 | 1,187,090
Loans and leases receivable, net of allowance | 5,148,861 | 3,919,642
Accrued interest receivable | 22,800 | 15,113
Derivative assets | 9,042 | 6,379
Financial liabilities |  |
Deposits | 6,303,085 | 4,671,831
Advances from Federal Home Loan Bank | 930,000 | 633,000
Long term debt | 261,876 | 93,569
Derivative liabilities | 1,067 | 3,235
Accrued interest payable | $ 4,234 | $ 2,044

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