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Securities (Details 2) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
Available-for-sale Securities, Debt Maturities, Next Twelve Months, Amortized Cost Basis | $ 4,313 |
Less Than 12 Months |  |
Fair Value | 389,798 | $ 266,768
Unrealized Losses | (7,370) | (2,112)
More Than 12 Months |  |
Fair Value | 210,358 | 222,763
Unrealized Losses | (10,485) | (7,423)
Total |  |
Fair Value | 600,156 | 489,531
Unrealized Losses | (17,855) | (9,535)
US Government Agencies Debt Securities [Member] |  |
Less Than 12 Months |  |
Fair Value | 9,212 | 9,321
Unrealized Losses | (191) | (86)
More Than 12 Months |  |
Fair Value | 3,419 | 3,538
Unrealized Losses | (217) | (232)
Total |  |
Fair Value | 12,631 | 12,859
Unrealized Losses | (408) | (318)
Mortgage Backed Securities - Residential |  |
Less Than 12 Months |  |
Fair Value | 114,928 | 79,918
Unrealized Losses | (2,398) | (425)
More Than 12 Months |  |
Fair Value | 50,851 | 53,815
Unrealized Losses | (2,297) | (1,387)
Total |  |
Fair Value | 165,779 | 133,733
Unrealized Losses | (4,695) | (1,812)
Collateralized Mortgage Obligations |  |
Less Than 12 Months |  |
Fair Value | 200,046 | 150,182
Unrealized Losses | (3,784) | (1,418)
More Than 12 Months |  |
Fair Value | 137,790 | 146,750
Unrealized Losses | (7,138) | (5,287)
Total |  |
Fair Value | 337,836 | 296,932
Unrealized Losses | (10,922) | (6,705)
State and Municipal Obligations |  |
Less Than 12 Months |  |
Fair Value | 65,612 | 27,347
Unrealized Losses | (997) | (183)
More Than 12 Months |  |
Fair Value | 18,298 | 18,660
Unrealized Losses | (833) | (517)
Total |  |
Fair Value | 83,910 | 46,007
Unrealized Losses | $ (1,830) | (700)
Collateralized Debt Obligations |  |
Less Than 12 Months |  |
Fair Value |  | 0
Unrealized Losses |  | 0
More Than 12 Months |  |
Fair Value |  | 0
Unrealized Losses |  | 0
Total |  |
Fair Value |  | 0
Unrealized Losses |  | $ 0

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