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Investment Securities (Investment securities) (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013
--- | --- | ---
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | $ 1,249,769 | $ 1,575,043
Available-for-sale Securities, Gross Unrealized Gains | 37,106 | 34,096
Available-for-sale Securities, Gross Unrealized Losses | 12,996 | 20,714
Available-for-sale Securities | 1,273,879 | 1,588,425
Available for sale - Weighted Average Yield | 2.96% | 2.89%
Held-to-maturity, Amortized cost | 144,305 |
Held to maturity Securities Unrecognized Gains | 82 |
Held-to-maturity Securities, Unrecognized Loss | 170 |
Held to maturity Fair Value | 144,217 | 0
Held to maturity - Weighted Average Yield | 1.95% |
Total Securities - Amortized Cost | 1,394,074 |
Total Securities Gross Unrealized Gains | 37,188 |
Total Securities Gross Unrealized Losses | 13,166 |
Total Securities Fair Value | 1,418,096 |
Marketable Securities Weighted Average Yield | 2.86% |
Collateralized Mortgage Backed Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 1,217,686 | 1,419,117
Available-for-sale Securities, Gross Unrealized Gains | 36,968 | 33,929
Available-for-sale Securities, Gross Unrealized Losses | 7,493 | 13,507
Available-for-sale Securities | 1,247,161 | 1,439,539
Available for sale - Weighted Average Yield | 2.93% | 2.76%
Held-to-maturity, Amortized cost | 144,305 |
Held to maturity Fair Value | 144,217 |
Collateralized Mortgage Backed Securities [Member] | FNMA and FHLMC [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 1,023,303 | 1,190,910
Available-for-sale Securities, Gross Unrealized Gains | 36,414 | 33,089
Available-for-sale Securities, Gross Unrealized Losses | 3,082 | 6,669
Available-for-sale Securities | 1,056,635 | 1,217,330
Available for sale - Weighted Average Yield | 3.13% | 2.93%
Held-to-maturity, Amortized cost | 144,305 |
Held to maturity Securities Unrecognized Gains | 82 |
Held-to-maturity Securities, Unrecognized Loss | 170 |
Held to maturity Fair Value | 144,217 |
Held to maturity - Weighted Average Yield | 1.95% |
Collateralized Mortgage Backed Securities [Member] | GNMA [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 5,241 | 7,406
Available-for-sale Securities, Gross Unrealized Gains | 348 | 433
Available-for-sale Securities, Gross Unrealized Losses | 21 | 24
Available-for-sale Securities | 5,568 | 7,815
Available for sale - Weighted Average Yield | 4.92% | 4.92%
Collateralized Mortgage Backed Securities [Member] | CMO's [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 189,142 | 220,801
Available-for-sale Securities, Gross Unrealized Gains | 206 | 407
Available-for-sale Securities, Gross Unrealized Losses | 4,390 | 6,814
Available-for-sale Securities | 184,958 | 214,394
Available for sale - Weighted Average Yield | 1.80% | 1.78%
Securities Investment [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 32,083 | 155,926
Available-for-sale Securities, Gross Unrealized Gains | 138 | 167
Available-for-sale Securities, Gross Unrealized Losses | 5,503 | 7,207
Available-for-sale Securities | 26,718 | 148,886
Available for sale - Weighted Average Yield | 4.15% | 2.99%
Held-to-maturity, Amortized cost | 0 |
Held to maturity Fair Value | 0 |
Securities Investment [Member] | US Treasury Securities [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 0 |
Available-for-sale Securities, Gross Unrealized Gains | 0 |
Available-for-sale Securities, Gross Unrealized Losses | 0 |
Available-for-sale Securities | 0 |
Available for sale - Weighted Average Yield | 0.00% |
Securities Investment [Member] | Obligation of US Government sponsored agencies at loss [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 7,795 | 10,691
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 34 | 42
Available-for-sale Securities | 7,761 | 10,649
Available for sale - Weighted Average Yield | 1.32% | 1.21%
Securities Investment [Member] | Obligation of Puerto Rico Government and political subdivisions [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 20,915 | 121,035
Available-for-sale Securities, Gross Unrealized Gains | 0 | 0
Available-for-sale Securities, Gross Unrealized Losses | 5,469 | 6,845
Available-for-sale Securities | 15,446 | 114,190
Available for sale - Weighted Average Yield | 5.41% | 4.38%
Securities Investment [Member] | Other Debt Obligations [Member] |  |
Schedule of Investments [Line Items] |  |
Available for sale Amortized Cost | 3,373 | 24,200
Available-for-sale Securities, Gross Unrealized Gains | 138 | 167
Available-for-sale Securities, Gross Unrealized Losses | 0 | 320
Available-for-sale Securities | $ 3,511 | $ 24,047
Available for sale - Weighted Average Yield | 2.91% | 3.46%

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