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Investment Securities - Unrealized losses (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017
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Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | $ 118,138 | $ 180,744
12 Months or More, Fair Value | 238,832 | 74,586
Total Fair Value | 356,970 | 255,330
Less than 12 Months, Unrealized Losses | (972) | (2,148)
12 Months or More, Unrealized Losses | (8,499) | (2,195)
Total Unrealized Losses | 9,471 | 4,343
U.S. Government agencies |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 14,891 | 8,201
12 Months or More, Fair Value | 6,430 | 6,741
Total Fair Value | 21,321 | 14,942
Less than 12 Months, Unrealized Losses | (254) | (47)
12 Months or More, Unrealized Losses | (148) | (27)
Total Unrealized Losses | 402 | 74
Obligations of states and political subdivisions |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 10,056 | 1,627
12 Months or More, Fair Value | 22,945 | 3,357
Total Fair Value | 33,001 | 4,984
Less than 12 Months, Unrealized Losses | (99) | (3)
12 Months or More, Unrealized Losses | (488) | (87)
Total Unrealized Losses | 587 | 90
U.S. Government sponsored entities and agencies collateralized by residential mortgage obligations |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 61,866 | 82,604
12 Months or More, Fair Value | 124,673 | 64,488
Total Fair Value | 186,539 | 147,092
Less than 12 Months, Unrealized Losses | (424) | (822)
12 Months or More, Unrealized Losses | (4,287) | (2,081)
Total Unrealized Losses | 4,711 | 2,903
Private label residential mortgage and asset backed securities |  |
Schedule of Available-for-sale Securities |  |
Less than 12 Months, Fair Value | 31,325 | 88,312
12 Months or More, Fair Value | 84,784 | 0
Total Fair Value | 116,109 | 88,312
Less than 12 Months, Unrealized Losses | (195) | (1,276)
12 Months or More, Unrealized Losses | (3,576) | 0
Total Unrealized Losses | $ 3,771 | $ 1,276

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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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- Definition Amount of accumulated unrealized loss on 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 12 months or longer. + 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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