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Share-Based Compensation - Fair Values for SARs and Stock Options Estimated on Grant Date Using Black-Scholes-Merton Option-Pricing Formula Which Incorporates Assumptions (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Payment Arrangement [Abstract]      
Weighted-average fair value of SARs granted (in usd per share) $ 18.30 $ 18.29 $ 22.31
Total intrinsic value of SARs exercised $ 1,581 $ 545 $ 354
Tax benefit from SARs exercised $ 327 $ 26 $ 176
Weighted-average fair value of restricted stock units granted (in usd per share) $ 51.76 $ 41.75 $ 64.61
Total fair value of restricted stock units vested $ 12,623 $ 6,600 $ 10,325
Expected volatility 45.34% 37.55% 35.05%
Expected term (in years) 5 years 8 months 12 days 5 years 8 months 12 days 5 years 8 months 12 days
Risk-free rate 0.70% 1.44% 2.56%
Dividend yield 0.44% 0.39% 0.32%