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2. Investment securities (Details 1) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2021 | Dec. 31, 2020
Investment Securities With Continuous Unrealized Loss Position |  |
Less than 12 months, fair value | $ 120,742 | $ 87,953
Less than 12 months, unrealized losses | 2,368 | 652
12 months or more, fair value | 6,077 | 8,955
12 months or more, unrealized losses | 222 | 236
Total, fair value | 126,819 | 96,908
Total, unrealized losses | 2,590 | 888
U.S. Government Sponsored Enterprises |  |
Investment Securities With Continuous Unrealized Loss Position |  |
Less than 12 months, fair value | 0 | 0
Less than 12 months, unrealized losses | 0 | 0
12 months or more, fair value | 4,098 | 4,193
12 months or more, unrealized losses | 202 | 208
Total, fair value | 4,098 | 4,193
Total, unrealized losses | 202 | 208
Mortgage-Backed Securities |  |
Investment Securities With Continuous Unrealized Loss Position |  |
Less than 12 months, fair value | 82,322 | 80,827
Less than 12 months, unrealized losses | 947 | 565
12 months or more, fair value | 1,979 | 4,762
12 months or more, unrealized losses | 20 | 28
Total, fair value | 84,301 | 85,589
Total, unrealized losses | 967 | 593
State and Political Subdivisions |  |
Investment Securities With Continuous Unrealized Loss Position |  |
Less than 12 months, fair value | 38,420 | 7,126
Less than 12 months, unrealized losses | 1,421 | 87
12 months or more, fair value | 0 | 0
12 months or more, unrealized losses | 0 | 0
Total, fair value | 38,420 | 7,126
Total, unrealized losses | $ 1,421 | $ 87

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