XML 37 R78.htm IDEA: XBRL DOCUMENT v3.20.1
Employee Retirement and Postretirement Benefits - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Mar. 17, 2020
Mar. 31, 2020
Mar. 31, 2019
Employee Contribution   100.00%  
Percentage of employees contribution matched by the company     4.00%
Employer Contribution   $ 1.2 $ 1.2
Stock options, shares granted   1,121,402  
Stock options exercised   25,747  
Stock options, shares expired   1,906,849  
Restricted Stock Units (RSUs) [Member]      
Share units granted   2,953,496  
Share units forfeited   87,138  
Share units vested   752,342  
Share units issued 186,139 186,139  
Restricted Stock [Member]      
Share units vested   8,227  
Deferred Stock Units [Member]      
Share units granted   124,996  
Share units vested   26,508  
Employee Stock Purchase Plan [Member]      
Common stock, shares issued under ESPP   87,681