Long-term Debt - Credit Agreement (Details) $ in Thousands			3 Months Ended		42 Months Ended
		Mar. 31, 2021 USD ($)	Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)	Mar. 28, 2021 USD ($)	Dec. 31, 2020 USD ($)
Debt Instrument [Line Items]
Debt financing and related expenses			$ 200	$ 0
Net leverage ratio		3.00	3.00
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Payments of Financing Costs			$ 1,000
Write off of Deferred Debt Issuance Cost			200
Line of Credit Facility, Maximum Borrowing Capacity		$ 300,000	300,000		$ 300,000
Debt Instrument, Maturity Date		Mar. 29, 2026			Sep. 20, 2022
Debt Instrument, Basis Spread on Variable Rate	[1]	1.50%			1.50%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Revolving Credit Facility, Capacity Available for Foreign Revolver Loans		$ 125,000	125,000
Line of Credit Facility, Maximum Borrowing Capacity		300,000	300,000
Revolving Credit Facility, Amount Outstanding		0	0			$ 50,500
Revolving Credit Facility, Remaining Borrowing Capacity		300,000	300,000			$ 249,500
Letters of credit [Member]
Debt Instrument [Line Items]
Letters of Credit, Maximum Borrowing Capacity		40,000	40,000
Letters of Credit Outstanding, Amount		0	0
Revolving credit and term loan facilities [Member]
Debt Instrument [Line Items]
Incremental debt commitments capacity		$ 200,000	$ 200,000

[1] The interest rate spread is based upon the leverage ratio, as defined, as of the most recent determination date.