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Income Taxes (Narrative) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Loss Carryforwards [Line Items]
Statutory income tax rate	21.00%	21.00%	21.00%
Inter-entity payments expense		$ 27,358
Deferred income tax expense		4,148
Non-deductible expenses, other			$ 3,805
Unrecognized tax benefits	$ 0	$ 0	$ 0
Deferred tax liabilities, undistributed earnings	1,685,889
Deferred tax liability not recognized, undistributed earnings of foreign subsidiaries	340,308
Undistributed earnings	$ 2,860,889
Canada Revenue Agency [Member]
Operating Loss Carryforwards [Line Items]
Foreign Statutory income tax rate	27.00%
Operating loss carryforwards	$ 47,966

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Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences.

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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other nondeductible expenses.

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Amount of operating loss carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

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The earnings that is allocated to common stock and participating securities to the extent that each security may share in earnings as if all of the earnings for the period had been distributed.

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Foreign Statutory Income Tax Rate

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