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Income Taxes - Reconciliation Between Statutory Tax Rate to Income Before Income Taxes and Actual Provision for Income Taxes (Details)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Taxes
PRC income tax rate	25.00%	25.00%	25.00%
Expenses not deductible for tax purposes	0.18%	(0.33%)	0.04%
Effect of non-deductible settlement expenses	0.40%	(78.12%)
Effect of tax-free investment income	(0.57%)	1.47%	(1.37%)
Effect of different tax rate of subsidiary in other jurisdiction	(4.85%)	6.44%	(5.13%)
Effect of deferred tax asset allowance	1.56%	(4.13%)	5.85%
Effect of tax holidays	(1.27%)	2.01%	(2.60%)
Effect of income from equity in fund of fund	2.91%	0.16%	1.27%
Effect of true-ups	(0.82%)	3.28%	(0.47%)
Effect of others	0.10%	0.06%	0.14%
Effective Income Tax Rate Reconciliation, Percent, Total	22.64%	(44.16%)	22.73%

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Effective income tax rate reconciliation income from equity in fund of fund.

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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 attributable to changes in the valuation allowance for deferred tax assets.

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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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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 attributable to nondeductible expenses.

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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 attributable to income exempt from income tax because of a tax holiday.

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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 attributable to income tax settlements. Including, but not limited to, domestic tax settlement, foreign tax settlement, state and local tax settlement, and other tax settlements.

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