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Income Taxes - Schedule of Reconciliation between Income Tax Expense to Income before Income Taxes and Actual Provision for Income Tax (Detail) ¥ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 CNY (¥) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 CNY (¥) | Dec. 31, 2020 CNY (¥) | Dec. 31, 2019
Income Taxes And Tax Related [Line Items] |  |  |  |  |
Net income before provision for income tax | ¥ 2,031,217 | $ 294,498 | ¥ (2,095,064) | ¥ 2,898,534 |
PRC statutory tax rate |  |  |  |  | 10.00%
Income tax expense (benefit) at statutory tax rate | 507,804 |  | (523,766) | 724,634 |
Permanent differences and Research and development super-deduction | (34,966) |  | (55,871) | (11,861) |
Change in valuation allowance | 64,389 |  | 118,570 | 95,240 |
Effect of income tax rate difference in other jurisdictions | 35,564 |  | 1,201,729 | 123,778 |
Effect of tax holidays and preferential tax rates | (147,894) |  | (195,209) | (282,775) |
Effect of the preferential tax rate adjustment of prior year's EIT | (26,873) |  | (60,325) | (113,396) |
Effect of PRC withholding tax | 164,257 |  | 337,428 | 220,000 |
Provision for income tax | ¥ 562,281 | $ 81,523 | ¥ 822,556 | ¥ 755,620 |
PRC [Member] |  |  |  |  |
Income Taxes And Tax Related [Line Items] |  |  |  |  |
PRC statutory tax rate | 25.00% | 25.00% | 25.00% | 25.00% |

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- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 6.I.Fact.4) -URI https://asc.fasb.org/extlink&oid=122134291&loc=d3e330036-122817 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08(h)(2)) -URI https://asc.fasb.org/extlink&oid=120395691&loc=d3e23780-122690 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI https://asc.fasb.org/extlink&oid=121826272&loc=d3e32687-109319 + Details
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- Definition Amount of income (loss) from continuing operations before deduction of income tax expense (benefit) and income (loss) attributable to noncontrolling interest, and addition of income (loss) from equity method investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (f) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8933-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8906-108599 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8924-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e8736-108599 + Details
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