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Stock-Based Compensation (Tables)
 6 Months Ended
Jun. 30, 2023
Compensation Related Costs [Abstract]  
Schedule of Nonvested Share Activity [Table Text Block]
The following summarizes the activity of our PSUs and RSUs awarded under our incentive plan for the six months ended June 30, 2023:
PSUsRSUs
Number of sharesWeighted Average Grant-Date Fair ValueNumber of sharesWeighted Average Grant-Date Fair Value
Outstanding, December 31, 2022317,854 $51.46 155,339 $65.17 
Granted93,282 69.33 115,252 69.34 
Performance condition adjustment (a)39,873 79.80 — — 
Vested(154,794)40.61 (87,632)60.64 
Forfeited(5,399)68.55 (3,200)70.32 
Outstanding, June 30, 2023290,816 $66.54 179,759 $69.96 
_______________________________
(a)    Represents additional PSUs granted during the six months ended June 30, 2023, related to above-target achievement of the 2022 performance condition described above.
Stock-Based Compensation Expense Recognized [Table Text Block] Total stock-based compensation recognized from PSUs and RSUs, net of forfeitures, was as follows:
Three Months Ended
June 30		Six Months Ended
June 30
2023202220232022
(thousands)
PSUs$2,577 $1,695 $4,391 $3,001 
RSUs1,617 1,317 3,127 2,402 
Total$4,194 $3,012 $7,518 $5,403