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Debt (Summary of Debt) (Details) - USD ($) $ in Thousands	3 Months Ended
Debt (Summary of Debt) (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021	Dec. 21, 2016
Debt [Line Items]
Short-term debt	$ 22,083	$ 6,147
Total long-term debt	1,581,984	1,737,438
Total debt	1,604,067	1,743,585
Current portion	3,564	3,498
Non-current portion	1,578,420	1,733,940
Delayed Draw Term Loans [Member]
Debt [Line Items]
Less: unamortized debt issue costs	(437)	(463)
2.30% Term Loan, Due September 2026 [Member] \| Delayed Draw Term Loans [Member]
Debt [Line Items]
Long-term Debt	$ 95,044	93,283
Weighted average interest rate	2.30%
Long-term revolver loan, 2.29% Maturing September 2026 [Member] \| Revolver Loan [Member]
Debt [Line Items]
Long-term Debt		46,206
Weighted average interest rate	2.29%
Long-term revolver loan, 2.29% Maturing September 2026 [Member] \| Revolver Loan [Member]
Debt [Line Items]
Long-term Debt		56,492
Weighted average interest rate	2.29%
Long-term revolver loan, 1.89% Maturing September 2026 [Member] \| Revolver Loan [Member]
Debt [Line Items]
Long-term Debt	$ 57,000	117,000
Weighted average interest rate	1.89%
5.375% Senior Unsecured Note, Due January 2025 [Member] \| Senior Unsecured Notes [Member]
Debt [Line Items]
Long-term Debt	$ 500,000	500,000
Less: unamortized debt issue costs	$ (5,027)	(5,469)
Interest rate	5.375%		5.375%
Maturity date	Jan. 15, 2025
4.75% Senior Unsecured Note, Due December 2031 (2021 USD Notes) \| Senior Unsecured Notes [Member]
Debt [Line Items]
Long-term Debt	$ 600,000	600,000
Less: unamortized debt issue costs	$ (2,603)	(1,948)
Weighted average interest rate	4.75%
4.95% Senior Unsecured Note, Due December 2029 (2021 CAD Notes) \| Senior Unsecured Notes [Member]
Debt [Line Items]
Long-term Debt	$ 339,755	333,464
Less: unamortized debt issue costs	$ (1,748)	$ (1,127)
Weighted average interest rate	4.95%