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Investment Securities (Investment securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 955,646 | $ 1,187,679
Available-for-sale Securities, Gross Unrealized Gains | 27,312 | 38,490
Available-for-sale Securities, Gross Unrealized Losses | 8,349 | 9,631
Available-for-sale Securities | $ 974,609 | $ 1,216,538
Available for sale - Weighted Average Yield | 2.87% | 2.96%
Held-to-maturity, Amortized cost | $ 620,189 | $ 162,752
Held to maturity Securities Unrecognized Gains | 426 | 1,402
Held-to-maturity Securities, Unrecognized Loss | 5,936 | 0
Held to maturity Fair Value | $ 614,679 | $ 164,154
Held to maturity - Weighted Average Yield | 2.17% | 2.48%
Total Securities - Amortized Cost | $ 1,575,835 | $ 1,350,431
Total Securities Gross Unrealized Gains | 27,738 | 39,892
Total Securities Gross Unrealized Losses | 14,285 | 9,631
Total Securities Fair Value | $ 1,589,288 | $ 1,380,692
Marketable Securities Weighted Average Yield | 2.60% | 2.90%
Collateralized Mortgage Backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 930,279 | $ 1,156,455
Available-for-sale Securities, Gross Unrealized Gains | 27,184 | 38,300
Available-for-sale Securities, Gross Unrealized Losses | 4,250 | 4,364
Available-for-sale Securities | $ 953,213 | $ 1,190,391
Available for sale - Weighted Average Yield | 2.82% | 2.92%
Held-to-maturity, Amortized cost | $ 595,157 |
Held to maturity Securities Unrecognized Gains | 426 |
Held-to-maturity Securities, Unrecognized Loss | 5,865 |
Held to maturity Fair Value | $ 589,718 |
Held to maturity - Weighted Average Yield | 2.24% |
Collateralized Mortgage Backed Securities [Member] | FNMA and FHLMC [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 735,363 | $ 972,836
Available-for-sale Securities, Gross Unrealized Gains | 25,791 | 37,876
Available-for-sale Securities, Gross Unrealized Losses | 1,509 | 1,203
Available-for-sale Securities | $ 759,645 | $ 1,009,509
Available for sale - Weighted Average Yield | 2.97% | 3.12%
Held-to-maturity, Amortized cost | $ 595,157 | $ 162,752
Held to maturity Securities Unrecognized Gains | 426 | 1,402
Held-to-maturity Securities, Unrecognized Loss | 5,865 | 0
Held to maturity Fair Value | $ 589,718 | $ 164,154
Held to maturity - Weighted Average Yield | 2.24% | 2.48%
Collateralized Mortgage Backed Securities [Member] | GNMA [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 57,129 | $ 4,473
Available-for-sale Securities, Gross Unrealized Gains | 1,366 | 288
Available-for-sale Securities, Gross Unrealized Losses | 0 | 8
Available-for-sale Securities | $ 58,495 | $ 4,753
Available for sale - Weighted Average Yield | 3.19% | 4.94%
Collateralized Mortgage Backed Securities [Member] | CMO's [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 137,787 | $ 179,146
Available-for-sale Securities, Gross Unrealized Gains | 27 | 136
Available-for-sale Securities, Gross Unrealized Losses | 2,741 | 3,153
Available-for-sale Securities | $ 135,073 | $ 176,129
Available for sale - Weighted Average Yield | 1.85% | 1.81%
Securities Investment [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 25,367 | $ 31,224
Available-for-sale Securities, Gross Unrealized Gains | 128 | 190
Available-for-sale Securities, Gross Unrealized Losses | 4,099 | 5,267
Available-for-sale Securities | $ 21,396 | $ 26,147
Available for sale - Weighted Average Yield | 4.94% | 4.23%
Held-to-maturity, Amortized cost | $ 25,032 |
Held to maturity Securities Unrecognized Gains | 0 |
Held-to-maturity Securities, Unrecognized Loss | 71 |
Held to maturity Fair Value | $ 24,961 |
Held to maturity - Weighted Average Yield | 0.49% |
Securities Investment [Member] | US Treasury Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Held-to-maturity, Amortized cost | $ 25,032 |
Held to maturity Securities Unrecognized Gains | 0 |
Held-to-maturity Securities, Unrecognized Loss | 71 |
Held to maturity Fair Value | $ 24,961 |
Held to maturity - Weighted Average Yield | 0.49% |
Securities Investment [Member] | Obligation of US Government sponsored agencies at loss [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 5,122 | $ 7,148
Available-for-sale Securities, Gross Unrealized Gains | 0 | 33
Available-for-sale Securities, Gross Unrealized Losses | 29 | 0
Available-for-sale Securities | $ 5,093 | $ 7,181
Available for sale - Weighted Average Yield | 1.36% | 1.34%
Securities Investment [Member] | Obligation of Puerto Rico Government and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 17,801 | $ 20,939
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 4,070 | 5,267
Available-for-sale Securities | $ 13,731 | $ 15,672
Available for sale - Weighted Average Yield | 6.24% | 5.41%
Securities Investment [Member] | Other Debt Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 2,444 | $ 3,137
Available-for-sale Securities, Gross Unrealized Gains | 128 | 157
Available-for-sale Securities, Gross Unrealized Losses | 0 | 0
Available-for-sale Securities | $ 2,572 | $ 3,294
Available for sale - Weighted Average Yield | 2.98% | 2.95%

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