XML 64 R65.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Pension and Employee Benefit Plans - Components of Pension and Employee Benefit Expenses (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Compensation And Retirement Disclosure [Abstract]      
Service cost     $ 415
Interest cost $ 1,303 $ 1,190 1,314
Expected return on plan assets (1,254) (1,511) (1,723)
Net amortization and deferral 263 238 227
Net periodic benefit cost (income) $ 312 $ (83) $ 233