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Stock-Based Compensation (Tables)
 9 Months Ended
Sep. 30, 2020
Share-based Payment Arrangement [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 nine months ended September 30, 2020:
PSUsRSUs
Number of sharesWeighted Average Grant-Date Fair ValueNumber of sharesWeighted Average Grant-Date Fair Value
Outstanding, December 31, 2019295,347 $31.09 257,564 $31.14 
Granted94,850 36.45 125,716 36.45 
Performance condition adjustment (a)(6,989)29.48 — — 
Vested(162,622)28.93 (143,807)30.88 
Forfeited(24,246)32.57 (26,707)32.82 
Outstanding, September 30, 2020196,340 $35.34 212,766 $34.24 
_______________________________ 
(a)    Represents total PSUs forfeited during the nine months ended September 30, 2020, related to the 2019 performance condition adjustment 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
September 30		Nine Months Ended
September 30
2020201920202019
(thousands)
PSUs$1,503 $800 $2,804 $2,515 
RSUs991 1,147 3,035 3,501 
Total$2,494 $1,947 $5,839 $6,016