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New Accounting Standards and Reclassifications (New Accounting Standards) (Details) - Credit Agreement [Member] - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Term Loan Facility [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	$ 650,000	$ 650,000
Revolving Credit Facility [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	803,944	203,927
Revolving Credit Facility [Member] | Base Rate [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	158,000
Revolving Credit Facility [Member] | LIBOR [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	631,000	200,000
Revolving Credit Facility [Member] | LIBOR [Member] | Term Loan Facility [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	1,281,000
Revolving Credit Facility [Member] | Canadian Bankers Acceptance Loan [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Long term debt	3,944	$ 3,927
Maximum [Member] | Revolving Credit Facility [Member] | Term Loan Facility [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Increase in annual interest expense estimated from reference rate reform change	$ 1,000

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