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Fair Value (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | $ 782,609 | $ 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 | 18,665 | 16,578
Total realized/unrealized gains or losses - Included in earnings | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 3,072 | 2,773
Transfers | 0 |
Purchases |  | 0
Settlements | (15,152) | (1,066)
Ending balance | 6,585 | 18,285
US Government Agencies Debt Securities [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 12,777 | 13,695
State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 231,156 | 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 | 4,210
Total realized/unrealized gains or losses - Included in earnings | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 0 | 0
Transfers | 0 |
Purchases |  | 0
Settlements | 0 | (530)
Ending balance | 3,135 | 3,680
Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 3,450 | 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 | 15,530 | 12,368
Total realized/unrealized gains or losses - Included in earnings | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 3,072 | 2,773
Transfers | 0 |
Purchases |  | 0
Settlements | (15,152) | (536)
Ending balance | 3,450 | 14,605
Mortgage Backed Securities - Residential |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 190,739 | 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 | 344,487 | 339,670
Fair Value, Inputs, Level 3 [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 6,585 | 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
Fair Value, Inputs, Level 3 [Member] | State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 3,135 | 3,680
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 3,450 | 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
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
Fair Value, Inputs, Level 1 [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 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
Fair Value, Inputs, Level 1 [Member] | State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 0 | 0
Fair Value, Inputs, Level 1 [Member] | Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 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
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
Fair Value, Inputs, Level 2 [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 776,024 | 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 | 482 | 298
Derivative Liability | 482 | 298
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 12,777 | 13,695
Fair Value, Inputs, Level 2 [Member] | State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 228,021 | 227,942
Fair Value, Inputs, Level 2 [Member] | Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 0 | 0
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Residential |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 190,739 | 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 | $ 344,487 | $ 339,670

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