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Incentive and Deferred Compensation Plans - Table (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Deferred executive compensation liability      
Deferred executive compensation, beginning of the year $ 24,616 $ 26,182 $ 30,057
Total plan awards and earnings 20,962 12,712 12,566
Total plan awards paid (10,121) (12,852) (14,482)
Deferred executive compensation, end of the year 32,223 24,616 26,182
Annual incentive plan awards      
Deferred executive compensation liability      
Annual incentive plan awards 5,619 2,745 4,751
Long-term incentive plan awards      
Deferred executive compensation liability      
Long-term incentive plan awards 12,381 7,267 6,331
Forfeitures (356) 0 0
Deferred compensation plans and stock compensation plan for outside directors      
Deferred executive compensation liability      
Employer match and hypothetical earnings on deferred compensation 2,962 2,700 1,484
Compensation deferred 4,668 1,579 1,928
Distributions from the deferred compensation plans (2,081) (797) (1,321)
Stock compensation plan for outside directors      
Deferred executive compensation liability      
Funding of rabbi trust (1,493) (1,434) (1,165)
Incentive compensation deferral plan      
Deferred executive compensation liability      
Funding of rabbi trust $ (3,972) $ (774) $ (1,401)