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Investments - Unrealized losses (Details) - USD ($) $ in Thousands | Mar. 31, 2019 | Dec. 31, 2018
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Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | $ 102,392 | $ 118,138
Less than 12 Months, Unrealized Losses | (1,010) | (972)
12 Months or More, Fair Value | 179,432 | 238,832
12 Months or More, Unrealized Losses | (2,657) | (8,499)
Total Fair Value | 281,824 | 356,970
Total Unrealized Losses | (3,667) | (9,471)
U.S. Government agencies |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 12,922 | 14,891
Less than 12 Months, Unrealized Losses | (222) | (254)
12 Months or More, Fair Value | 6,007 | 6,430
12 Months or More, Unrealized Losses | (112) | (148)
Total Fair Value | 18,929 | 21,321
Total Unrealized Losses | (334) | (402)
Obligations of states and political subdivisions |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 0 | 10,056
Less than 12 Months, Unrealized Losses | 0 | (99)
12 Months or More, Fair Value | 3,163 | 22,945
12 Months or More, Unrealized Losses | (50) | (488)
Total Fair Value | 3,163 | 33,001
Total Unrealized Losses | (50) | (587)
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 63,382 | 61,866
Less than 12 Months, Unrealized Losses | (683) | (424)
12 Months or More, Fair Value | 86,950 | 124,673
12 Months or More, Unrealized Losses | (1,913) | (4,287)
Total Fair Value | 150,332 | 186,539
Total Unrealized Losses | (2,596) | (4,711)
Private label mortgage and asset backed securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 26,088 | 31,325
Less than 12 Months, Unrealized Losses | (105) | (195)
12 Months or More, Fair Value | 83,312 | 84,784
12 Months or More, Unrealized Losses | (582) | (3,576)
Total Fair Value | 109,400 | 116,109
Total Unrealized Losses | $ (687) | $ (3,771)

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- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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