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v3.4.0.3

Securities Available for Sale - Aggregate Unrealized Losses and Fair Value (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) security | Mar. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) security
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security |  | 10 |  | 61
Number of Securities, 12 months or longer | security |  | 14 |  | 12
Number of Securities, Total | security |  | 24 |  | 73
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months |  | $ 21,786 |  | $ 560,758
Fair Value - 12 months or longer |  | 111,953 |  | 102,554
Fair Value - Total |  | 133,739 |  | 663,312
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months |  | (75) |  | (4,254)
Gross Unrealized Losses - 12 months or longer |  | (2,378) |  | (4,498)
Gross Unrealized Losses - Total |  | (2,453) |  | $ (8,752)
Unrealized gain on available-for-sale securities |  | 15,592 | $ 5,255 |
Reclassification adjustments for gains realized in income |  | $ 0 | $ (424) |
GSE collateralized mortgage obligations |  |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security | [1] | 1 |  | 31
Number of Securities, 12 months or longer | security | [1] | 9 |  | 8
Number of Securities, Total | security | [1] | 10 |  | 39
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months | [1] | $ 7,098 |  | $ 300,202
Fair Value - 12 months or longer | [1] | 78,032 |  | 70,857
Fair Value - Total | [1] | 85,130 |  | 371,059
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months | [1] | (26) |  | (2,611)
Gross Unrealized Losses - 12 months or longer | [1] | (676) |  | (2,344)
Gross Unrealized Losses - Total | [1] | $ (702) |  | $ (4,955)
GSE mortgage-backed securities |  |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security | [1] | 7 |  | 28
Number of Securities, 12 months or longer | security | [1] | 4 |  | 3
Number of Securities, Total | security | [1] | 11 |  | 31
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months | [1] | $ 13,612 |  | $ 247,160
Fair Value - 12 months or longer | [1] | 30,527 |  | 27,947
Fair Value - Total | [1] | 44,139 |  | 275,107
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months | [1] | (42) |  | (1,487)
Gross Unrealized Losses - 12 months or longer | [1] | (547) |  | (1,358)
Gross Unrealized Losses - Total | [1] | $ (589) |  | $ (2,845)
Trust preferred securities |  |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security |  | 0 |  | 0
Number of Securities, 12 months or longer | security |  | 1 |  | 1
Number of Securities, Total | security |  | 1 |  | 1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months |  | $ 0 |  | $ 0
Fair Value - 12 months or longer |  | 3,394 |  | 3,750
Fair Value - Total |  | 3,394 |  | 3,750
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months |  | 0 |  | 0
Gross Unrealized Losses - 12 months or longer |  | (1,155) |  | (796)
Gross Unrealized Losses - Total |  | $ (1,155) |  | $ (796)
Municipal bonds |  |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security |  | 2 |  | 1
Number of Securities, 12 months or longer | security |  | 0 |  | 0
Number of Securities, Total | security |  | 2 |  | 1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months |  | $ 1,076 |  | $ 127
Fair Value - 12 months or longer |  | 0 |  | 0
Fair Value - Total |  | 1,076 |  | 127
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months |  | (7) |  | 0
Gross Unrealized Losses - 12 months or longer |  | 0 |  | 0
Gross Unrealized Losses - Total |  | $ (7) |  | $ 0
Mutual funds - GSE mortgage related securities |  |  |  |
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions [Abstract] |  |  |  |
Number of Securities, Less than 12 months | security |  | 0 |  | 1
Number of Securities, 12 months or longer | security |  | 0 |  | 0
Number of Securities, Total | security |  | 0 |  | 1
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value [Abstract] |  |  |  |
Fair Value - Less than 12 months |  | $ 0 |  | $ 13,269
Fair Value - 12 months or longer |  | 0 |  | 0
Fair Value - Total |  | 0 |  | 13,269
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Gross Unrealized Losses - Less than 12 months |  | 0 |  | (156)
Gross Unrealized Losses - 12 months or longer |  | 0 |  | 0
Gross Unrealized Losses - Total |  | $ 0 |  | $ (156)
Credit concentration risk | Stockholders' equity | Non-US Government and agency securities |  |  |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss [Abstract] |  |  |  |
Maximum exposure to any single issuer |  | 10.00% |  | 10.00%
[1] | Investments in U.S. Government agency and U.S. Government sponsored enterprises

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