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Securities - Unrealized Loss Positions (Details) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2015 USD ($) security | Dec. 31, 2014 USD ($) security
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 28 | 35
Greater than 12 months in an unrealized loss position | security | 24 | 8
Total | security | 52 | 43
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 3,300 | $ 4,764
Greater than 12 months in an unrealized loss position | 8,079 | 2,591
Total | 11,379 | 7,355
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 166,128 | 241,626
Greater than 12 months in an unrealized loss position | 194,212 | 68,811
Total | $ 360,340 | $ 310,437
Securities Held-to-Maturity, Number of Securities |  |
Less than 12 months in an unrealized loss position | security |  | 7
Greater than 12 months in an unrealized loss position | security | 2 | 4
Total | security | 2 | 11
Securities Held-to-Maturity, Unrealized Losses |  |
Less than 12 months in an unrealized loss position |  | $ 457
Greater than 12 months in an unrealized loss position | $ 24 | 982
Total | 24 | 1,439
Securities Held-to-Maturity, Fair Value |  |
Less than 12 months in an unrealized loss position |  | 49,302
Greater than 12 months in an unrealized loss position | 34,550 | 46,283
Total | $ 34,550 | $ 95,585
U.S. Treasury |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security |  | 1
Total | security |  | 1
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position |  | $ 2
Total |  | 2
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position |  | 1,527
Total |  | $ 1,527
U.S. government agencies |  |
Securities Available-for-Sale, Number of Securities |  |
Greater than 12 months in an unrealized loss position | security | 1 | 1
Total | security | 1 | 1
Securities Available-for-Sale, Unrealized Losses |  |
Greater than 12 months in an unrealized loss position | $ 113 | $ 87
Total | 113 | 87
Securities Available-for-Sale, Fair Value |  |
Greater than 12 months in an unrealized loss position | 1,577 | 1,624
Total | $ 1,577 | $ 1,624
U.S. government agency mortgage-backed |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 1 |
Total | security | 1 |
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 15 |
Total | 15 |
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 2,034 |
Total | $ 2,034 |
States and political subdivisions |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 1 | 4
Greater than 12 months in an unrealized loss position | security | 1 |
Total | security | 2 | 4
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 28 | $ 96
Greater than 12 months in an unrealized loss position | 121 |
Total | 149 | 96
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 1,490 | 4,896
Greater than 12 months in an unrealized loss position | 1,703 |
Total | $ 3,193 | $ 4,896
Corporate bonds |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 5 | 4
Greater than 12 months in an unrealized loss position | security | 3 | 1
Total | security | 8 | 5
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 160 | $ 486
Greater than 12 months in an unrealized loss position | 420 | 81
Total | 580 | 567
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 15,000 | 15,246
Greater than 12 months in an unrealized loss position | 14,580 | 1,921
Total | $ 29,580 | $ 17,167
Collateralized mortgage obligations |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 7 | 5
Greater than 12 months in an unrealized loss position | security | 4 | 3
Total | security | 11 | 8
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 386 | $ 900
Greater than 12 months in an unrealized loss position | 805 | 1,232
Total | 1,191 | 2,132
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 43,651 | 38,284
Greater than 12 months in an unrealized loss position | 19,211 | 21,604
Total | $ 62,862 | $ 59,888
Securities Held-to-Maturity, Number of Securities |  |
Less than 12 months in an unrealized loss position | security |  | 7
Greater than 12 months in an unrealized loss position | security | 2 | 4
Total | security | 2 | 11
Securities Held-to-Maturity, Unrealized Losses |  |
Less than 12 months in an unrealized loss position |  | $ 457
Greater than 12 months in an unrealized loss position | $ 24 | 982
Total | 24 | 1,439
Securities Held-to-Maturity, Fair Value |  |
Less than 12 months in an unrealized loss position |  | 49,302
Greater than 12 months in an unrealized loss position | 34,550 | 46,283
Total | $ 34,550 | $ 95,585
Asset-backed securities |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 9 | 9
Greater than 12 months in an unrealized loss position | security | 6 | 3
Total | security | 15 | 12
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 2,499 | $ 1,077
Greater than 12 months in an unrealized loss position | 5,554 | 1,191
Total | 8,053 | 2,268
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 74,269 | 99,286
Greater than 12 months in an unrealized loss position | 93,838 | 43,662
Total | $ 168,107 | $ 142,948
Collateralized loan obligations |  |
Securities Available-for-Sale, Number of Securities |  |
Less than 12 months in an unrealized loss position | security | 5 | 12
Greater than 12 months in an unrealized loss position | security | 9 |
Total | security | 14 | 12
Securities Available-for-Sale, Unrealized Losses |  |
Less than 12 months in an unrealized loss position | $ 212 | $ 2,203
Greater than 12 months in an unrealized loss position | 1,066 |
Total | 1,278 | 2,203
Securities Available-for-Sale, Fair Value |  |
Less than 12 months in an unrealized loss position | 29,684 | 82,387
Greater than 12 months in an unrealized loss position | 63,303 |
Total | $ 92,987 | $ 82,387

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