XML 38 R50.htm IDEA: XBRL DOCUMENT v3.20.1
Schedule of Net Periodic Benefit Costs (Detail) - Pension Benefits - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Net Period Benefit Cost Assumptions [Line Items]    
Service cost $ 40 $ 56
Interest cost 225 932
Expected return on plan assets (36) (563)
Administrative expenses 23 10
Settlement loss 508  
Amortization of net actuarial losses (44) 72
Net periodic pension cost $ 716 $ 507