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Accumulated Other Comprehensive Income (Loss) by Component (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Balance $ 618,997 $ 579,672
Total other comprehensive income (loss) , net of tax 5,563 (22,633)
Balance 639,201 549,683
Accumulated Net Investment Gain (Loss) Attributable to Parent [Member]    
Balance 1,290 (3,982)
Other comprehensive income before reclassifications, net of tax (2,217) (10,202)
Amounts reclassified from accumulated other comprehensive income, net of tax 0 25
Total other comprehensive income (loss) , net of tax (2,217) (10,177)
Balance (927) (14,159)
Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]    
Balance (17,521) (5,863)
Other comprehensive income before reclassifications, net of tax 5,973 (13,748)
Amounts reclassified from accumulated other comprehensive income, net of tax 1,825 143
Total other comprehensive income (loss) , net of tax 7,798 (13,605)
Balance (9,723) (19,468)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Balance (1,884) (983)
Other comprehensive income before reclassifications, net of tax 0 0
Amounts reclassified from accumulated other comprehensive income, net of tax 66 53
Total other comprehensive income (loss) , net of tax 66 53
Balance (1,818) (930)
Accumulated Gain (Loss), Financial Liability, Fair Value Option, Attributable to Parent [Member]    
Balance 1,849 1,021
Other comprehensive income before reclassifications, net of tax (84) 1,096
Amounts reclassified from accumulated other comprehensive income, net of tax 0 0
Total other comprehensive income (loss) , net of tax (84) 1,096
Balance 1,765 2,117
AOCI Attributable to Parent [Member]    
Balance (16,266) (9,807)
Other comprehensive income before reclassifications, net of tax 3,672 (22,854)
Amounts reclassified from accumulated other comprehensive income, net of tax 1,891 221
Total other comprehensive income (loss) , net of tax 5,563 (22,633)
Balance $ (10,703) $ (32,440)