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Investments (Details 1) $ in Thousands | Sep. 30, 2016 USD ($) Number | Dec. 31, 2015 USD ($) Number
--- | --- | ---
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number | 102 | 212
Fair value, Less than 12 months | $ 45,142 | $ 106,304
Unrealized losses, Less than 12 months | (230) | (877)
Fair value, 12 months or longer | 0 | 12,101
Unrealized losses, 12 months or longer | 0 | (198)
Total, Fair value | 45,142 | 118,405
Total, Unrealized losses | $ (230) | $ (1,075)
U. S. treasury securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number |  | 2
Fair value, Less than 12 months |  | $ 3,542
Unrealized losses, Less than 12 months |  | (1)
Fair value, 12 months or longer |  | 0
Unrealized losses, 12 months or longer |  | 0
Total, Fair value |  | 3,542
Total, Unrealized losses |  | $ (1)
U.S. federal agency obligations [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number | 3 | 18
Fair value, Less than 12 months | $ 6,198 | $ 23,015
Unrealized losses, Less than 12 months | (6) | (163)
Fair value, 12 months or longer | 0 | 1,976
Unrealized losses, 12 months or longer | 0 | (24)
Total, Fair value | 6,198 | 24,991
Total, Unrealized losses | $ (6) | $ (187)
Municipal obligations, tax exempt [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number | 78 | 47
Fair value, Less than 12 months | $ 27,441 | $ 11,328
Unrealized losses, Less than 12 months | (181) | (53)
Fair value, 12 months or longer | 0 | 2,132
Unrealized losses, 12 months or longer | 0 | (18)
Total, Fair value | 27,441 | 13,460
Total, Unrealized losses | $ (181) | $ (71)
Municipal obligations, taxable [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number | 2 | 105
Fair value, Less than 12 months | $ 567 | $ 38,605
Unrealized losses, Less than 12 months | (1) | (494)
Fair value, 12 months or longer | 0 | 5,068
Unrealized losses, 12 months or longer | 0 | (87)
Total, Fair value | 567 | 43,673
Total, Unrealized losses | $ (1) | $ (581)
Agency mortgage-backed securities [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
No. of securities | Number | 19 | 40
Fair value, Less than 12 months | $ 10,936 | $ 29,814
Unrealized losses, Less than 12 months | (42) | (166)
Fair value, 12 months or longer | 0 | 2,925
Unrealized losses, 12 months or longer | 0 | (69)
Total, Fair value | 10,936 | 32,739
Total, Unrealized losses | $ (42) | $ (235)

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