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Investments (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 USD ($) Security | Jun. 30, 2014 USD ($) | Jun. 30, 2015 USD ($) Security | Jun. 30, 2014 USD ($) | Dec. 31, 2014 USD ($)
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | $ 301,110 |  | $ 301,110 |  | $ 301,459
Gross Unrealized Gains | 4,492 |  | 4,492 |  | 5,603
Gross Unrealized Losses | (810) |  | (810) |  | (916)
Fair Value | $ 304,792 |  | $ 304,792 |  | 306,146
Number of securities owned with fair value than cost | Security | 72 |  | 72 |  |
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value | $ 94,444 |  | $ 94,444 |  | 36,508
Twelve Months or Greater, Fair Value | 18,579 |  | 18,579 |  | 67,011
Total, Fair Value | 113,023 |  | 113,023 |  | 103,519
Less than Twelve Months, Gross Unrealized Losses | (617) |  | (617) |  | (134)
Twelve Months or Greater, Gross Unrealized Losses | (193) |  | (193) |  | (782)
Total, Gross Unrealized Losses | $ (810) |  | (810) |  | (916)
Duration securities impaired, Minimum | 1 year |  |  |  |
Proceeds from sale of securities available-for-sale | $ 3,770 | $ 6,595 | 18,393 | $ 12,151 |
Realized investment gains (losses) [Abstract] |  |  |  |  |
Gross gains | 175 | 75 | 312 | 246 |
Gross losses | 0 | 0 | (11) | 0 |
Net gains | 175 | $ 75 | 301 | $ 246 |
Investment securities pledged as collateral | 170,900 |  | 170,900 |  | 186,400
Amortized Cost [Abstract] |  |  |  |  |
Due in one year or less | 3,420 |  | 3,420 |  |
Due after one year through five years | 166,695 |  | 166,695 |  |
Due after five years through ten years | 44,355 |  | 44,355 |  |
Due after ten years | 85,322 |  | 85,322 |  |
Total | 299,792 |  | 299,792 |  |
Fair Value [Abstract] |  |  |  |  |
Due in one year or less | 3,459 |  | 3,459 |  |
Due after one year through five years | 167,737 |  | 167,737 |  |
Due after five years through ten years | 45,146 |  | 45,146 |  |
Due after ten years | 86,675 |  | 86,675 |  |
Total | 303,017 |  | 303,017 |  |
U.S. Agency Securities [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | 167,187 |  | 167,187 |  | 150,847
Gross Unrealized Gains | 778 |  | 778 |  | 638
Gross Unrealized Losses | (385) |  | (385) |  | (600)
Fair Value | 167,580 |  | 167,580 |  | 150,885
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value | 60,908 |  | 60,908 |  | 27,382
Twelve Months or Greater, Fair Value | 10,910 |  | 10,910 |  | 43,642
Total, Fair Value | 71,818 |  | 71,818 |  | 71,024
Less than Twelve Months, Gross Unrealized Losses | (302) |  | (302) |  | (110)
Twelve Months or Greater, Gross Unrealized Losses | (83) |  | (83) |  | (490)
Total, Gross Unrealized Losses | (385) |  | (385) |  | (600)
US Treasury Securities [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost |  |  |  |  | 4,944
Gross Unrealized Gains |  |  |  |  | 0
Gross Unrealized Losses |  |  |  |  | (95)
Fair Value |  |  |  |  | 4,849
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value |  |  |  |  | 0
Twelve Months or Greater, Fair Value |  |  |  |  | 4,849
Total, Fair Value |  |  |  |  | 4,849
Less than Twelve Months, Gross Unrealized Losses |  |  |  |  | 0
Twelve Months or Greater, Gross Unrealized Losses |  |  |  |  | (95)
Total, Gross Unrealized Losses |  |  |  |  | (95)
Obligations of State and Political Subdivisions [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | 93,796 |  | 93,796 |  | 101,281
Gross Unrealized Gains | 2,829 |  | 2,829 |  | 3,854
Gross Unrealized Losses | (343) |  | (343) |  | (99)
Fair Value | 96,282 |  | 96,282 |  | 105,036
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value | 23,486 |  | 23,486 |  | 3,596
Twelve Months or Greater, Fair Value | 5,212 |  | 5,212 |  | 8,584
Total, Fair Value | 28,698 |  | 28,698 |  | 12,180
Less than Twelve Months, Gross Unrealized Losses | (263) |  | (263) |  | (19)
Twelve Months or Greater, Gross Unrealized Losses | (80) |  | (80) |  | (80)
Total, Gross Unrealized Losses | (343) |  | (343) |  | (99)
Corporate Obligations [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | 12,713 |  | 12,713 |  | 13,853
Gross Unrealized Gains | 141 |  | 141 |  | 190
Gross Unrealized Losses | (49) |  | (49) |  | (85)
Fair Value | 12,805 |  | 12,805 |  | 13,958
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value | 5,434 |  | 5,434 |  | 505
Twelve Months or Greater, Fair Value | 2,184 |  | 2,184 |  | 7,707
Total, Fair Value | 7,618 |  | 7,618 |  | 8,212
Less than Twelve Months, Gross Unrealized Losses | (31) |  | (31) |  | (1)
Twelve Months or Greater, Gross Unrealized Losses | (18) |  | (18) |  | (84)
Total, Gross Unrealized Losses | (49) |  | (49) |  | (85)
Mortgage-backed Securities in Government Sponsored Entities [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | 26,096 |  | 26,096 |  | 29,397
Gross Unrealized Gains | 287 |  | 287 |  | 368
Gross Unrealized Losses | (33) |  | (33) |  | (37)
Fair Value | 26,350 |  | 26,350 |  | 29,728
Available-For-Sale Securities, Fair Value and Gross Unrealized Losses [Abstract] |  |  |  |  |
Less than Twelve Months, Fair Value | 4,616 |  | 4,616 |  | 5,025
Twelve Months or Greater, Fair Value | 273 |  | 273 |  | 2,229
Total, Fair Value | 4,889 |  | 4,889 |  | 7,254
Less than Twelve Months, Gross Unrealized Losses | (21) |  | (21) |  | (4)
Twelve Months or Greater, Gross Unrealized Losses | (12) |  | (12) |  | (33)
Total, Gross Unrealized Losses | (33) |  | (33) |  | (37)
Equity Securities in Financial Institutions [Member] |  |  |  |  |
Available for Sale Securities Amortized Cost, Gross Unrealized Gains and Losses, and Fair Value [Abstract] |  |  |  |  |
Amortized Cost | 1,318 |  | 1,318 |  | 1,137
Gross Unrealized Gains | 457 |  | 457 |  | 553
Gross Unrealized Losses | 0 |  | 0 |  | 0
Fair Value | $ 1,775 |  | $ 1,775 |  | $ 1,690

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