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Stock and Incentive Programs for Employees and Directors - Schedule of Stock Option Activity (Detail) - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Shares Under Option    
Outstanding at beginning of period 420  
Cancelled/forfeited/expired (144)  
Outstanding at end of period 276 420
Vested and exercisable at end of period 276  
Weighted Average Exercise Price    
Outstanding at beginning of period $ 26.38  
Cancelled/forfeited/expired 31.76  
Outstanding at end of period 23.59 $ 26.38
Vested and exercisable at end of period $ 23.59  
Weighted Average Remaining Contractual Term (years)    
Outstanding 10 months 24 days 1 year 4 months 24 days
Vested and exercisable at end of period 10 months 24 days