Summary of Significant Accounting Policies - Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Amortization of employee benefit plan items:
Amounts reclassified from accumulated other comprehensive income (loss), tax		$ 69
Amount reclassified out of accumulated other comprehensive income		(208)	$ (97)
Actuarial gains and losses
Amortization of employee benefit plan items:
Total before tax	[1]		(639)
Plan settlement
Amortization of employee benefit plan items:
Total before tax	[2]		526
Accumulated Defined Benefit Plans Adjustment Attributable to Parent
Amortization of employee benefit plan items:
Total before tax			(113)
Amounts reclassified from accumulated other comprehensive income (loss), tax			16
Amount reclassified out of accumulated other comprehensive income		$ (208)	$ (97)

[1] These accumulated other comprehensive loss components are included in the computation of benefit plan costs in Note 7 “Employee Benefit Plans.”

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