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Fair Value (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | $ 884,176 | $ 891,082
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 | 19,600 | 21,203
Total realized/unrealized gains or losses - Included in earnings | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | (1,622) | (268)
Transfers | 0 |
Purchases |  | 0
Settlements | (616) | (1,335)
Ending balance | 17,362 | 19,600
US Government Agencies Debt Securities [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 10,768 | 10,693
State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 218,127 | 214,707
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 | 4,725 | 5,900
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 | (515) | (1,175)
Ending balance | 4,210 | 4,725
Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 13,152 | 14,875
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 | 14,875 | 15,303
Total realized/unrealized gains or losses - Included in earnings | 0 | 0
Total realized/unrealized gains or losses - Included in other comprehensive income | (1,622) | (268)
Transfers | 0 |
Purchases |  | 0
Settlements | (101) | (160)
Ending balance | 13,152 | 14,875
Mortgage Backed Securities - Residential |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 217,914 | 213,164
Mortgage Backed Securities - Commercial |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 8 | 9
Collateralized Mortgage Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 424,207 | 437,634
Fair Value, Inputs, Level 3 [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 17,362 | 19,600
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 | 4,210 | 4,725
Fair Value, Inputs, Level 3 [Member] | Collateralized Debt Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 13,152 | 14,875
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 | 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 | 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 | 866,814 | 871,482
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 | 1,675 | 1,176
Derivative Liability | 1,675 | 1,176
Fair Value, Inputs, Level 2 [Member] | US Government Agencies Debt Securities [Member] |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 10,768 | 10,693
Fair Value, Inputs, Level 2 [Member] | State and Municipal Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 213,917 | 209,982
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 | 217,914 | 213,164
Fair Value, Inputs, Level 2 [Member] | Mortgage Backed Securities - Commercial |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | 8 | 9
Fair Value, Inputs, Level 2 [Member] | Collateralized Mortgage Obligations |  |
Fair value measurement using significant unobservable input |  |
Securities available-for-sale | $ 424,207 | $ 437,634

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