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Fair Value (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018 | Dec. 31, 2017
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | $ 785,693 | $ 785,693 | $ 814,931
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs |  |  |
Beginning balance | 6,585 | 18,285 | 16,578
Total realized/unrealized gains or losses - Included in earnings | 0 | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 13 | 4,158 | 2,773
Transfers | 0 | 0 |
Purchases |  |  | 0
Settlements | (40) | (15,885) | (1,066)
Ending balance | 6,558 | 6,558 | 18,285
US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 12,473 | 12,473 | 13,695
State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 230,599 | 230,599 | 231,622
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs |  |  |
Beginning balance | 3,135 | 3,680 | 4,210
Total realized/unrealized gains or losses - Included in earnings | 0 | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 0 | 0 | 0
Transfers | 0 | 0 |
Purchases |  |  | 0
Settlements | 0 | (545) | (530)
Ending balance | 3,135 | 3,135 | 3,680
Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 3,423 | 3,423 | 14,605
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs |  |  |
Beginning balance | 3,450 | 14,605 | 12,368
Total realized/unrealized gains or losses - Included in earnings | 0 | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 13 | 4,158 | 2,773
Transfers | 0 | 0 |
Purchases |  |  | 0
Settlements | (40) | (15,340) | (536)
Ending balance | 3,423 | 3,423 | 14,605
Mortgage Backed Securities - Residential |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 184,651 | 184,651 | 215,338
Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale |  |  | 1
Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 354,547 | 354,547 | 339,670
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 6,558 | 6,558 | 18,285
Fair Value, Inputs, Level 3 [Member] | US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 3 [Member] | State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 3,135 | 3,135 | 3,680
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 3,423 | 3,423 | 14,605
Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities - Residential |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 3 [Member] | Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale |  |  | 0
Fair Value, Inputs, Level 3 [Member] | Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] | US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] | State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities - Residential |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale |  |  | 0
Fair Value, Inputs, Level 1 [Member] | Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 2 [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 779,135 | 779,135 | 796,646
Reconciliation and income statement classification of gains and losses for all assets measured at fair value on a recurring basis using significant unobservable inputs |  |  |
Derivative Assets | 687 | 687 | 298
Derivative Liability | 687 | 687 | 298
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 12,473 | 12,473 | 13,695
Fair Value, Inputs, Level 2 [Member] | State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 227,464 | 227,464 | 227,942
Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 0 | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Residential |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 184,651 | 184,651 | 215,338
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale |  |  | 1
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | $ 354,547 | $ 354,547 | $ 339,670

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