Accumulated Other Comprehensive Income - Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019
Amortization of pension and postretirement benefits items:
Actuarial loss (1)	[1]		$ (60)
Settlement expense (2)	[2]		526
Total before tax			466
Income tax			(133)
Amount reclassified out of accumulated other comprehensive income		$ (9)	$ 333

[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost in Note 3 “Employee Benefit Plans”

[2] This accumulated other comprehensive income component resulted from an international pension plan settlement.