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Stock Compensation Plans
 6 Months Ended
Jun. 30, 2020
Share-based Payment Arrangement [Abstract]  
Stock Compensation Plans STOCK COMPENSATION PLANS
The Company has various plans under which its officers, senior management, other key employees and directors may be granted equity-based awards. Equity awards outstanding under the plans include PRSUs, restricted stock units ("RSUs"), SSARs and Long-Term Incentive Plan awards. Liability-based awards outstanding under the plans are cash-settled RSUs.
Stock-based compensation expense and related tax benefits were as follows:
 Three Months Ended June 30,Six Months Ended June 30,
(DOLLARS IN THOUSANDS)2020201920202019
Equity-based awards$10,358  $10,696  $18,982  $18,300  
Liability-based awards3,136  2,061  2,497  2,791  
Total stock-based compensation expense13,494  12,757  21,479  21,091  
Less: Tax benefit(2,568) (2,141) (3,962) (3,523) 
Total stock-based compensation expense, after tax$10,926  $10,616  $17,517  $17,568