Reconciliation of Differences between Bermuda Statutory Income Tax Rate and Effective Tax Rate (Detail) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Bermuda tax rate	0.00%	0.00%	0.00%
Foreign tax rate	0.09%	(1.76%)	0.32%
Tax uncertainties	0.53%	1.25%	3.01%
Income tax (expense) benefit, net	0.62%	(0.51%)	3.33%
Foreign tax rate	$ 271	$ (1,291)	$ 188
Tax uncertainties	1,502	917	1,760
Income tax (expense) benefit	$ 1,773	$ (374)	$ 1,948

Effective income tax rate reconciliation, uncertain tax positions

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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

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Percentage 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 applicable to statutory income tax expense (benefit) outside of the country of domicile.

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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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 increase (decrease) in income tax contingencies. Including, but not limited to, domestic tax contingency, foreign tax contingency, state and local tax contingency, and other contingencies.

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