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Accumulated Other Comprehensive Income (Loss) - Changes in Accumulated Other Comprehensive Income by Component (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 | Mar. 31, 2020 | Jun. 30, 2019 | Mar. 31, 2019 | Jun. 30, 2020 | Jun. 30, 2019
Balance | $ 549,683 | $ 579,672 | $ 559,559 | $ 549,464 | $ 579,672 | $ 549,464
Total other comprehensive income (loss) , net of tax | 8,918 | (22,633) | (74) | 2,210 | (13,715) | 2,136
Balance | 571,921 | 549,683 | 565,390 | 559,559 | 571,921 | 565,390
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member] |  |  |  |  |  |
Balance | (14,159) | (3,982) | (10,029) | (15,649) | (3,982) | (15,649)
Other comprehensive income before reclassifications, net of tax | 11,414 |  | 6,204 |  | 1,212 | 11,824
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 37 |  | 10 |  | 62 | 10
Total other comprehensive income (loss) , net of tax | 11,451 |  | 6,214 |  | 1,274 | 11,834
Balance | (2,708) | (14,159) | (3,815) | (10,029) | (2,708) | (3,815)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] |  |  |  |  |  |
Balance | (19,468) | (5,863) | 199 | 3,704 | (5,863) | 3,704
Other comprehensive income before reclassifications, net of tax | (2,404) |  | (5,884) |  | (16,152) | (9,250)
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 399 |  | (447) |  | 542 | (586)
Total other comprehensive income (loss) , net of tax | (2,005) |  | (6,331) |  | (15,610) | (9,836)
Balance | (21,473) | (19,468) | (6,132) | 199 | (21,473) | (6,132)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] |  |  |  |  |  |
Balance | (930) | (983) | (1,666) | (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 |  | 8 |  | 105 | 15
Total other comprehensive income (loss) , net of tax | 52 |  | 8 |  | 105 | 15
Balance | (878) | (930) | (1,658) | (1,666) | (878) | (1,658)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member] |  |  |  |  |  |
Balance | 2,117 | 1,021 | 954 | 866 | 1,021 | 866
Other comprehensive income before reclassifications, net of tax | (580) |  | 35 |  | 516 | 123
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 0 |  | 0 |  | 0 | 0
Total other comprehensive income (loss) , net of tax | (580) |  | 35 |  | 516 | 123
Balance | 1,537 | 2,117 | 989 | 954 | 1,537 | 989
AOCI Attributable to Parent [Member] |  |  |  |  |  |
Balance | (32,440) | (9,807) | (10,542) | (12,752) | (9,807) | (12,752)
Other comprehensive income before reclassifications, net of tax | 8,430 |  | 355 |  | (14,424) | 2,697
Amounts reclassified from accumulated other comprehensive income (loss), net of tax | 488 |  | (429) |  | 709 | (561)
Total other comprehensive income (loss) , net of tax | 8,918 | (22,633) | (74) | 2,210 | (13,715) | 2,136
Balance | $ (23,522) | $ (32,440) | $ (10,616) | $ (10,542) | $ (23,522) | $ (10,616)

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