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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, 2018
Dec. 31, 2017
Shares Under Option    
Outstanding at beginning of period 1,257  
Cancelled/forfeited/expired (518)  
Outstanding at end of period 739 1,257
Vested and exercisable at end of period 739  
Weighted Average Exercise Price    
Outstanding at beginning of period $ 32.28  
Cancelled/forfeited/expired 49.78  
Outstanding at end of period 19.99 $ 32.28
Vested and exercisable at end of period $ 19.99  
Weighted Average Remaining Contractual Term (years)    
Outstanding 1 year 4 months 24 days 1 year 7 months 6 days
Vested and exercisable at end of period 1 year 4 months 24 days