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Securities Available-for-Sale (Details) - Unrealized gains on investment securities - USD ($) $ in Thousands | Mar. 31, 2021 | Dec. 31, 2020
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Securities available-for-sale |  |
Securities, Amortized Cost | $ 436,834 | $ 477,326
Securities, Gross Unrealized Gains | 7,959 | 11,015
Securities, Gross Unrealized Losses | (2,770) | (386)
Securities, Fair Value | 442,023 | 487,955
Securities, Allowance for Investment Credit Losses |  |
Federal agency obligations [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 40,507 | 37,015
Securities, Gross Unrealized Gains | 1,141 | 1,508
Securities, Gross Unrealized Losses | (347) | (65)
Securities, Fair Value | 41,301 | 38,458
Securities, Allowance for Investment Credit Losses |  |
Residential mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 238,406 | 266,114
Securities, Gross Unrealized Gains | 3,628 | 4,811
Securities, Gross Unrealized Losses | (1,680) | (41)
Securities, Fair Value | 240,354 | 270,884
Securities, Allowance for Investment Credit Losses |  |
Commercial mortgage pass-through securities [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 6,881 | 6,906
Securities, Gross Unrealized Gains | 35 | 203
Securities, Gross Unrealized Losses | (502) | (187)
Securities, Fair Value | 6,414 | 6,922
Securities, Allowance for Investment Credit Losses |  |
Obligations of U.S. states and political subdivisions [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 127,809 | 138,539
Securities, Gross Unrealized Gains | 2,925 | 4,269
Securities, Gross Unrealized Losses | (231) |
Securities, Fair Value | 130,503 | 142,808
Securities, Allowance for Investment Credit Losses |  |
Corporate bonds and notes [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 17,444 | 24,925
Securities, Gross Unrealized Gains | 221 | 222
Securities, Gross Unrealized Losses |  | (52)
Securities, Fair Value | 17,665 | 25,095
Securities, Allowance for Investment Credit Losses |  |
Asset-backed securities [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 3,361 | 3,521
Securities, Gross Unrealized Gains | 8 |
Securities, Gross Unrealized Losses | (10) | (41)
Securities, Fair Value | 3,359 | 3,480
Securities, Allowance for Investment Credit Losses |  |
Certificates of deposit [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 149 | 149
Securities, Gross Unrealized Gains | 1 | 2
Securities, Gross Unrealized Losses |  |
Securities, Fair Value | 150 | 151
Securities, Allowance for Investment Credit Losses |  |
Other securities [Member] |  |
Securities available-for-sale |  |
Securities, Amortized Cost | 2,277 | 157
Securities, Gross Unrealized Gains |  |
Securities, Gross Unrealized Losses |  |
Securities, Fair Value | 2,277 | $ 157
Securities, Allowance for Investment Credit Losses |  |

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- Definition Securities, Allowance for Investment Credit Losses. + References No definition available. + Details
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- Definition Available for sale securities gross unrealized loss accumulated in investments. + References No definition available. + Details
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- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + References No definition available. + Details
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