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FAIR VALUE MEASUREMENT AND FAIR VALUE OF FINANCIAL INSTRUMENTS (Details 8) - USD ($) $ in Thousands | Jun. 30, 2015 | Dec. 31, 2014 | Jun. 30, 2014 | Dec. 31, 2013
--- | --- | --- | --- | ---
Financial Assets: |  |  |  |  |
Cash and cash equivalents |  | $ 1,877,914 | $ 1,039,885 | $ 1,246,044 | $ 895,820
Short-term investments |  | 274,838 | 338,714 |  |
Securities purchased under resale agreements ("resale agreements") |  | 1,100,000 | 1,225,000 |  |
Loans held for sale |  | 195,427 | 45,950 |  |
Loans receivable, net | [1] | 21,697,435 | 21,468,270 |  |
Investment in Federal Home Loan Bank ("FHLB") stock |  | 18,155 | 31,239 |  |
Investment in Federal Reserve Bank stock |  | 54,675 | 54,451 |  |
Financial Liabilities: |  |  |  |  |
Short-term borrowings |  | 3,271 |  |  |
FHLB advances |  | 318,322 | 317,241 |  |
Securities sold under repurchase agreements ("repurchase agreements") |  | 400,000 | 795,000 |  |
Long-term debt |  | 215,964 | 225,848 |  |
Carrying Amount |  |  |  |  |
Financial Assets: |  |  |  |  |
Cash and cash equivalents |  | 1,877,914 | 1,039,885 |  |
Short-term investments |  | 274,838 | 338,714 |  |
Securities purchased under resale agreements ("resale agreements") |  | 1,100,000 | 1,225,000 |  |
Loans held for sale |  | 195,427 | 45,950 |  |
Loans receivable, net |  | 21,697,435 | 21,468,270 |  |
Investment in Federal Home Loan Bank ("FHLB") stock |  | 18,155 | 31,239 |  |
Investment in Federal Reserve Bank stock |  | 54,675 | 54,451 |  |
Accrued interest receivable |  | 81,575 | 88,303 |  |
Financial Liabilities: |  |  |  |  |
Demand, savings and money market deposits |  | 18,872,270 | 17,896,035 |  |
Time deposits |  | 6,655,950 | 6,112,739 |  |
Short-term borrowings |  | 3,271 |  |  |
FHLB advances |  | 318,322 | 317,241 |  |
Securities sold under repurchase agreements ("repurchase agreements") |  | 400,000 | 795,000 |  |
Accrued interest payable |  | 10,762 | 11,303 |  |
Long-term debt |  | 215,964 | 225,848 |  |
Fair Value Measurements |  |  |  |  |
Financial Assets: |  |  |  |  |
Cash and cash equivalents |  | 1,877,914 | 1,039,885 |  |
Short-term investments |  | 274,838 | 338,714 |  |
Securities purchased under resale agreements ("resale agreements") |  | 1,091,775 | 1,191,060 |  |
Loans held for sale |  | 197,813 | 45,950 |  |
Loans receivable, net |  | 21,460,209 | 20,997,379 |  |
Investment in Federal Home Loan Bank ("FHLB") stock |  | 18,155 | 31,239 |  |
Investment in Federal Reserve Bank stock |  | 54,675 | 54,451 |  |
Accrued interest receivable |  | 81,575 | 88,303 |  |
Financial Liabilities: |  |  |  |  |
Demand, savings and money market deposits |  | 18,872,270 | 17,896,035 |  |
Time deposits |  | 6,640,165 | 6,095,217 |  |
Short-term borrowings |  | 3,271 |  |  |
FHLB advances |  | 334,284 | 336,302 |  |
Securities sold under repurchase agreements ("repurchase agreements") |  | 388,498 | 870,434 |  |
Accrued interest payable |  | 10,762 | 11,303 |  |
Long-term debt |  | 193,157 | 205,777 |  |
Fair Value Measurements | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |
Financial Assets: |  |  |  |  |
Cash and cash equivalents |  | 1,877,914 | 1,039,885 |  |
Fair Value Measurements | Significant Other Observable Inputs (Level 2) |  |  |  |  |
Financial Assets: |  |  |  |  |
Short-term investments |  | 274,838 | 338,714 |  |
Securities purchased under resale agreements ("resale agreements") |  | 1,091,775 | 1,191,060 |  |
Loans held for sale |  | 197,813 | 45,950 |  |
Investment in Federal Home Loan Bank ("FHLB") stock |  | 18,155 | 31,239 |  |
Investment in Federal Reserve Bank stock |  | 54,675 | 54,451 |  |
Accrued interest receivable |  | 81,575 | 88,303 |  |
Financial Liabilities: |  |  |  |  |
Demand, savings and money market deposits |  | 18,872,270 | 17,896,035 |  |
Time deposits |  | 6,640,165 | 6,095,217 |  |
Short-term borrowings |  | 3,271 |  |  |
FHLB advances |  | 334,284 | 336,302 |  |
Securities sold under repurchase agreements ("repurchase agreements") |  | 388,498 | 870,434 |  |
Accrued interest payable |  | 10,762 | 11,303 |  |
Long-term debt |  | 193,157 | 205,777 |  |
Fair Value Measurements | Significant Unobservable Inputs (Level 3) |  |  |  |  |
Financial Assets: |  |  |  |  |
Loans receivable, net |  | $ 21,460,209 | $ 20,997,379 |  |
[1] | Loans net of ASC 310-30 discount.

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