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Fair Value (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2017 | Jun. 30, 2017 | Dec. 31, 2016
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | $ 851,577 | $ 851,577 | $ 853,725
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 | 15,673 | 16,578 | 19,600
Total realized/unrealized gains or losses - Included in earnings | 0 | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 398 | 143 | (2,066)
Transfers | 0 | 0 |
Purchases |  |  | 0
Settlements | (108) | (758) | (956)
Ending balance | 15,963 | 15,963 | 16,578
US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 14,807 | 14,807 | 13,249
State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 230,376 | 230,376 | 218,923
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 | 3,680 | 4,210 | 4,725
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 | (530) | (515)
Ending balance | 3,680 | 3,680 | 4,210
Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 12,283 | 12,283 | 12,368
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 | 11,993 | 12,368 | 14,875
Total realized/unrealized gains or losses - Included in earnings | 0 | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | 398 | 143 | (2,066)
Transfers | 0 | 0 |
Purchases |  |  | 0
Settlements | (108) | (228) | (441)
Ending balance | 12,283 | 12,283 | 12,368
Mortgage Backed Securities - Residential |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 242,560 | 242,560 | 261,005
Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 2 | 2 | 4
Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 351,549 | 351,549 | 348,176
Fair Value, Inputs, Level 3 [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 15,963 | 15,963 | 16,578
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 | 3,680 | 3,680 | 4,210
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 12,283 | 12,283 | 12,368
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 | 0 | 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 | 0 | 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 | 835,614 | 835,614 | 837,147
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 | 526 | 526 | 653
Derivative Liability | 526 | 526 | 653
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 14,807 | 14,807 | 13,249
Fair Value, Inputs, Level 2 [Member] | State and Municipal Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 226,696 | 226,696 | 214,713
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 | 242,560 | 242,560 | 261,005
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Commercial |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | 2 | 2 | 4
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations |  |  |
Fair value measurement using significant unobservable input |  |  |
Securities available-for-sale | $ 351,549 | $ 351,549 | $ 348,176

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