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Loans Receivable and Allowance for Loan Losses - Schedule of Accounts, Notes, Loans and Financing Receivable (Details) $ in Thousands | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2016 USD ($) segment | Dec. 31, 2015 USD ($) | Mar. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Real estate loans: |  |  |  |
Loans | $ 6,375,001 | $ 6,251,371 |  |
Less: deferred loan fees | (3,066) | (3,030) |  |
Loans receivable | 6,371,935 | 6,248,341 |  |
Less: allowance for loan losses | (76,856) | (76,408) | $ (69,594) | $ (67,758)
Loans receivable, net of allowance for loan losses | $ 6,295,079 | 6,171,933 |  |
Number of portfolio segments | segment | 4 |  |  |
Real estate loans |  |  |  |
Real estate loans: |  |  |  |
Loans | $ 5,132,517 | 5,069,482 |  |
Real estate loans | Residential |  |  |  |
Real estate loans: |  |  |  |
Loans | 32,390 | 33,797 |  |
Less: allowance for loan losses | (221) | (230) |  |
Real estate loans | Commercial & industrial |  |  |  |
Real estate loans: |  |  |  |
Loans | 4,957,751 | 4,912,655 |  |
Less: allowance for loan losses | (53,466) | (54,505) |  |
Real estate loans | Construction |  |  |  |
Real estate loans: |  |  |  |
Loans | 142,376 | 123,030 |  |
Less: allowance for loan losses | (1,054) | (917) |  |
Commercial business |  |  |  |
Real estate loans: |  |  |  |
Loans | 1,032,078 | 980,153 |  |
Less: allowance for loan losses | (19,202) | (16,547) |  |
Trade finance |  |  |  |
Real estate loans: |  |  |  |
Loans | 86,342 | 99,163 |  |
Less: allowance for loan losses | (2,085) | (3,592) |  |
Consumer and other |  |  |  |
Real estate loans: |  |  |  |
Loans | 124,064 | 102,573 |  |
Less: allowance for loan losses | $ (828) | $ (617) |  |

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