XML 84 R62.htm IDEA: XBRL DOCUMENT v3.20.1
Retirement Plans and Other Post-Retirement Benefits - Schedule of Net Periodic Costs of Pension and Post Retirement Medical Benefit Plans Included in Continuing Operations (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Pension Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 44 $ 484
Interest cost 301 3,450
Expected return on plan assets   (3,696)
Amortization of prior service cost/(credit) 12 34
Amortization of unrecognized/actuarial loss (gain) 160 775
Total net periodic benefit cost/(credit) 517 1,047
Other Benefits [Member]    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 7 9
Interest cost 46 84
Amortization of prior service cost/(credit) (116) (2)
Amortization of unrecognized/actuarial loss (gain) (209) (173)
Total net periodic benefit cost/(credit) $ (272) $ (82)