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Securities Securities (Held-to-Maturity Securities) (Details) - USD ($) $ in Thousands | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | $ 37,282 | $ 41,563
Gross unrecognized holding gains | 377 | 216
Gross unrecognized holding losses | (101) | (85)
Estimated fair value | 37,558 | 41,694
U.S. Government agency obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 1,495 | 1,490
Gross unrecognized holding gains | 1 | 0
Gross unrecognized holding losses | (11) | (17)
Estimated fair value | 1,485 | 1,473
Municipal obligations |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 16,038 | 16,088
Gross unrecognized holding gains | 332 | 85
Gross unrecognized holding losses | (5) | (18)
Estimated fair value | 16,365 | 16,155
Asset-backed securities |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 0 | 0
Gross unrecognized holding gains | 0 | 0
Gross unrecognized holding losses | 0 | 0
Estimated fair value | 0 | 0
Collateralized mortgage obligations - government issued |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 11,718 | 14,505
Gross unrecognized holding gains | 32 | 57
Gross unrecognized holding losses | (41) | (31)
Estimated fair value | 11,709 | 14,531
Collateralized mortgage obligations - government-sponsored enterprises |  |
Schedule of Held-to-maturity Securities [Line Items] |  |
Amortized cost | 8,031 | 9,480
Gross unrecognized holding gains | 12 | 74
Gross unrecognized holding losses | (44) | (19)
Estimated fair value | $ 7,999 | $ 9,535

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