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FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 6) - USD ($) $ in Thousands | Sep. 30, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Dec. 31, 2014
--- | --- | --- | --- | ---
Financial assets: |  |  |  |
Cash and cash equivalents | $ 1,666,832 | $ 1,360,887 | $ 1,875,703 | $ 1,039,885
Short-term investments | 307,473 | 299,916 |  |
Resale agreements | 1,500,000 | 1,600,000 |  |
Held-to-maturity investment security | 154,461 | 0 |  |
Loans held-for-sale | 47,719 | 31,958 |  |
Loans held-for-investment, net | 24,476,150 | 23,378,789 |  |
Investment in FHLB stock | 17,250 | 28,770 |  |
Investment in Federal Reserve Bank stock | 55,355 | 54,932 |  |
Customer deposits: |  |  |  |
Short-term borrowings | 36,992 | 0 |  |
FHLB advances | 321,084 | 1,019,424 |  |
Repurchase agreements | 200,000 | 0 |  |
Long-term debt | 191,265 | 206,084 |  |
Carrying amount of repurchase agreements eligible for netting against resale agreements | 250,000 | 450,000 |  |
Gross repurchase agreements | 450,000 | 450,000 |  |
Carrying Amount |  |  |  |
Financial assets: |  |  |  |
Cash and cash equivalents | 1,666,832 | 1,360,887 |  |
Short-term investments | 307,473 | 299,916 |  |
Resale agreements | 1,500,000 | 1,600,000 |  |
Held-to-maturity investment security | 154,461 |  |  |
Loans held-for-sale | 47,719 | 31,958 |  |
Loans held-for-investment, net | 24,476,150 | 23,378,789 |  |
Investment in FHLB stock | 17,250 | 28,770 |  |
Investment in Federal Reserve Bank stock | 55,355 | 54,932 |  |
Accrued interest receivable | 88,343 | 89,243 |  |
Customer deposits: |  |  |  |
Demand, interest checking, savings and money market deposits | 22,994,054 | 20,859,086 |  |
Time deposits | 5,598,387 | 6,616,895 |  |
Short-term borrowings | 36,992 |  |  |
FHLB advances | 321,084 | 1,019,424 |  |
Repurchase agreements | 200,000 |  |  |
Long-term debt | 191,265 | 206,084 |  |
Accrued interest payable | 7,516 | 8,848 |  |
Fair Value Measurements |  |  |  |
Financial assets: |  |  |  |
Cash and cash equivalents | 1,666,832 | 1,360,887 |  |
Short-term investments | 307,473 | 299,916 |  |
Resale agreements | 1,496,965 | 1,533,961 |  |
Held-to-maturity investment security | 154,296 |  |  |
Loans held-for-sale | 47,719 | 31,958 |  |
Loans held-for-investment, net | 24,349,603 | 23,000,817 |  |
Investment in FHLB stock | 17,250 | 28,770 |  |
Investment in Federal Reserve Bank stock | 55,355 | 54,932 |  |
Accrued interest receivable | 88,343 | 89,243 |  |
Customer deposits: |  |  |  |
Demand, interest checking, savings and money market deposits | 22,994,054 | 20,859,086 |  |
Time deposits | 5,603,591 | 6,606,942 |  |
Short-term borrowings | 36,992 |  |  |
FHLB advances | 333,437 | 1,032,000 |  |
Repurchase agreements | 263,948 |  |  |
Long-term debt | 195,801 | 186,593 |  |
Accrued interest payable | 7,516 | 8,848 |  |
Fair Value Measurements | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |
Financial assets: |  |  |  |
Cash and cash equivalents | 1,666,832 | 1,360,887 |  |
Fair Value Measurements | Significant Other Observable Inputs (Level 2) |  |  |  |
Financial assets: |  |  |  |
Short-term investments | 307,473 | 299,916 |  |
Resale agreements | 1,496,965 | 1,533,961 |  |
Loans held-for-sale | 47,719 | 31,958 |  |
Investment in FHLB stock | 17,250 | 28,770 |  |
Investment in Federal Reserve Bank stock | 55,355 | 54,932 |  |
Accrued interest receivable | 88,343 | 89,243 |  |
Customer deposits: |  |  |  |
Demand, interest checking, savings and money market deposits | 22,994,054 | 20,859,086 |  |
Time deposits | 5,603,591 | 6,606,942 |  |
Short-term borrowings | 36,992 |  |  |
FHLB advances | 333,437 | 1,032,000 |  |
Repurchase agreements | 263,948 |  |  |
Long-term debt | 195,801 | 186,593 |  |
Accrued interest payable | 7,516 | 8,848 |  |
Fair Value Measurements | Significant Unobservable Inputs (Level 3) |  |  |  |
Financial assets: |  |  |  |
Held-to-maturity investment security | 154,296 |  |  |
Loans held-for-investment, net | $ 24,349,603 | $ 23,000,817 |  |

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