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Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Balance | $ 571,921 | $ 549,683 | $ 579,672 | $ 565,390 | $ 559,559 | $ 549,464 | $ 579,672 | $ 549,464
Total other comprehensive income (loss) , net of tax | 5,214 | 8,918 | (22,633) | (2,353) | (74) | 2,210 | (8,501) | (217)
Balance | 586,406 | 571,921 | 549,683 | 568,392 | 565,390 | 559,559 | 586,406 | 568,392
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |  |  |
Balance | (2,708) |  | (3,982) | (3,815) |  | (15,649) | (3,982) | (15,649)
Other comprehensive income before reclassifications, net of tax | 3,185 |  |  | (475) |  |  | 4,397 | 11,349
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 |  |  | 0 |  |  | 62 | 10
Total other comprehensive income (loss) , net of tax | 3,185 |  |  | (475) |  |  | 4,459 | 11,359
Balance | 477 | (2,708) |  | (4,290) | (3,815) |  | 477 | (4,290)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |  |  |  |  |  |
Balance | (21,473) |  | (5,863) | (6,132) |  | 3,704 | (5,863) | 3,704
Other comprehensive income before reclassifications, net of tax | 937 |  |  | (1,664) |  |  | (15,215) | (10,914)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 929 |  |  | (282) |  |  | 1,471 | (868)
Total other comprehensive income (loss) , net of tax | 1,866 |  |  | (1,946) |  |  | (13,744) | (11,782)
Balance | (19,607) | (21,473) |  | (8,078) | (6,132) |  | (19,607) | (8,078)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |  |  |
Balance | (878) |  | (983) | (1,658) |  | (1,673) | (983) | (1,673)
Other comprehensive income before reclassifications, net of tax | 0 |  |  | 0 |  |  | 0 | 0
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 52 |  |  | 7 |  |  | 157 | 22
Total other comprehensive income (loss) , net of tax | 52 |  |  | 7 |  |  | 157 | 22
Balance | (826) | (878) |  | (1,651) | (1,658) |  | (826) | (1,651)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] |  |  |  |  |  |  |  |
Balance | 1,537 |  | 1,021 | 989 |  | 866 | 1,021 | 866
Other comprehensive income before reclassifications, net of tax | 111 |  |  | 61 |  |  | 627 | 184
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 |  |  | 0 |  |  | 0 | 0
Total other comprehensive income (loss) , net of tax | 111 |  |  | 61 |  |  | 627 | 184
Balance | 1,648 | 1,537 |  | 1,050 | 989 |  | 1,648 | 1,050
AOCI Attributable to Parent [Member] |  |  |  |  |  |  |  |
Balance | (23,522) | (32,440) | (9,807) | (10,616) | (10,542) | (12,752) | (9,807) | (12,752)
Other comprehensive income before reclassifications, net of tax | 4,233 |  |  | (2,078) |  |  | (10,191) | 619
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 981 |  |  | (275) |  |  | 1,690 | (836)
Total other comprehensive income (loss) , net of tax | 5,214 | 8,918 | (22,633) | (2,353) | (74) | 2,210 | (8,501) | (217)
Balance | $ (18,308) | $ (23,522) | $ (32,440) | $ (12,969) | $ (10,616) | $ (10,542) | $ (18,308) | $ (12,969)

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