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Stock-Based Compensation (Tables)
 12 Months Ended
Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]  
Disclosure of share-based compensation arrangements by share-based payment award
Stock-based compensation expense under all share-based payment plans—our Employee Stock Purchase Plan, stock option plans, stock-settled stock appreciation rights ("SSARs"), and restricted stock units ("RSUs")—included in the results of operations was as follows:
 Year Ended December 31,
 202320222021
Compensation expense, all share-based payment plans$6,723 $7,930 $4,625 
Income tax benefit1,293 1,722 793 
Schedule of share-based compensation, restricted stock units award activity The following table summarizes PRSUs and RSUs as of December 31, 2023:
Restricted Stock UnitsNumber of
Stock Units		Weighted-
Average
Grant Date
Value		Weighted-
Average
Remaining
Contractual
Life		Unrecognized
Compensation
Cost		Aggregate
Intrinsic
Value
Unvested, January 1, 2023766,267 $14.95    
Granted238,918 18.29    
Forfeited— —    
Vested(71,342)12.18    
Unvested, December 31, 2023933,843 $16.02 1.3 years$5,763 $19,424 
Employee PRSUs885,572 $15.97 1.3 years$5,388 $18,420 
Nonemployee Director RSUs48,271 $16.79 1.4 years$375 $1,004 
Schedule of share-based payment award, stock options, valuation assumptions
The fair values of stock-based awards granted were estimated at the dates of grant with the following weighted-average assumptions:
 Year Ended December 31,
 202320222021
Volatility rate9.6 %9.7 %9.9 %
Risk-free interest rate4.1 %1.7 %.3 %
Expected dividend yield.4 %.4 %.4 %
Expected life of awards (years)3.03.03.0
Schedule of share-based compensation, stock options, activity The following table summarizes activity under the stock option plans for the year ended December 31, 2023:
Stock OptionsNumber of
Options
Outstanding		Weighted-
Average
Exercise
Price		Weighted-
Average
Remaining
Contractual
Life		Unrecognized
Compensation
Cost		Aggregate
Intrinsic
Value
Outstanding, January 1, 20232,072,949$8.59    
Granted——    
Exercised(263,318)7.00    
Forfeited(120,800)5.80    
Outstanding, December 31, 20231,688,831$9.04 3.4 years$155 $19,861 
Exercisable, December 31, 20231,488,455$8.69 3.1 years $18,025 
Schedule of share-based compensation, shares authorized under stock option plans, by exercise price range
Information regarding the stock options outstanding at December 31, 2023 is summarized below:
Stock Options
 Exercise Price		Number
Outstanding		Weighted-Average
Remaining
Contractual Life		Weighted-
Average
Exercise
Price		Number
Exercisable		Weighted-
Average
Exercise
Price
Employee options:     
$6.60 257,324 0.5 years$6.60 257,324 $6.60 
7.53 253,200 1.5 years7.53 253,200 7.53 
8.18 288,000 2.5 years8.18 288,000 8.18 
8.80 182,800 3.5 years8.80 182,800 8.80 
9.55 200,350 4.5 years9.55 200,350 9.55 
10.55 41,425 5.2 years10.55 30,305 10.55 
10.55 184,266 5.5 years10.55 134,928 10.55 
12.10 46,506 6.2 years12.10 23,788 12.10 
12.10 234,960 6.5 years12.10 117,760 12.10 
 1,688,831 3.4 years$9.04 1,488,455 $8.69