Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Line Items]
Capital loss carry-forwards	$ 1,800	$ 2,500
Foreign provision for income taxes	93,100	100,200	$ 117,200
Undistributed earnings	744,000
Unrecognized deferred tax liability related to temporary differences	17,700
Earnings retained by subsidiaries and equity accounted investments	767,000	702,700	645,800
Gross unrecognized tax benefits	15,991	18,859	$ 20,298
Unrecognized tax benefits that would impact effective tax rate	6,900	8,600
Accrued interest and penalties	3,500	3,900
Capital Loss Carryforward [Member]
Income Tax Disclosure [Line Items]
Capital loss carry-forwards	82,500	$ 82,200
Canada Revenue Agency [Member] | Maximum [Member]
Income Tax Disclosure [Line Items]
Federal and provincial income tax estimated, exclusive of interest and penalties	30,000
Canada Revenue Agency [Member] | Minimum [Member]
Income Tax Disclosure [Line Items]
Federal and provincial income tax estimated, exclusive of interest and penalties	$ 26,000