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Incentive and Deferred Compensation Plans - Table (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Deferred executive compensation liability      
Deferred executive compensation, beginning of the year $ 26,182 $ 30,057 $ 32,908
Total plan awards and earnings 12,712 12,566 19,713
Total plan awards paid (12,852) (14,482) (20,621)
Deferred executive compensation, end of the year 24,616 26,182 30,057
Annual incentive plan awards      
Deferred executive compensation liability      
Annual incentive plan awards 2,745 4,751 6,118
Long-term incentive plan awards      
Deferred executive compensation liability      
Long-term incentive plan awards 7,267 6,331 10,931
Forfeitures 0 0 (593)
Deferred compensation plans and stock compensation plan for outside directors      
Deferred executive compensation liability      
Employer match and hypothetical earnings on deferred compensation 2,700 1,484 2,664
Compensation deferred 1,579 1,928 680
Distributions from the deferred compensation plans (797) (1,321) (853)
Stock compensation plan for outside directors      
Deferred executive compensation liability      
Funding of rabbi trust (1,434) (1,165) (1,177)
Incentive compensation deferral plan      
Deferred executive compensation liability      
Funding of rabbi trust $ (774) $ (1,401) $ 0