v3.26.1
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
Dec. 31, 2025
CNY (¥)
Dec. 31, 2025
USD ($)
Dec. 31, 2024
CNY (¥)
Dec. 31, 2023
CNY (¥)
Income Taxes And Tax Related [Line Items]        
Net income before provision for income tax ¥ 1,662,273 $ 237,704 ¥ 1,825,379 ¥ 2,652,361
Income tax expense at statutory tax rate 415,568   456,345 663,090
Permanent differences and Research and development super-deduction     (67,319) (76,414)
Change in valuation allowance 28,096   80,576 31,283
Effect of income tax rate difference in other jurisdictions 17,474   6,672 41,854
Effect of tax holidays and preferential tax rates (124,138)   (150,067) (213,804)
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amount (8,114)      
Effect of the preferential tax rate adjustment of prior year's EIT     0 0
Effect of PRC withholding tax 633,586   518,815 184,014
Loss on disposal of subsidiaries deductible for tax purposes (55,711)      
Tax incentives relating to R&D expenditures (63,892)      
Effect of changes in tax laws or rates enacted in the current year 0      
Changes in unrecognized tax benefits 0      
Provision for income tax ¥ 842,869 $ 120,529 ¥ 845,022 ¥ 630,023
Income Taxes Percent [Abstract]        
PRC statutory tax rate 25.00% 25.00%    
PRC withholding tax 38.10% 38.10%    
Foreign tax effects 1.10% 1.10%    
Effect of changes in tax laws or rates enacted in the current year 0.00% 0.00%    
Tax incentives relating to R&D expenditures (3.80%) (3.80%)    
Change in valuation allowance 1.70% 1.70%    
Loss on disposal of subsidiaries deductible for tax purposes (3.40%) (3.40%)    
Changes in unrecognized tax benefits 0.00% 0.00%    
Effect of tax holidays inside PRC (7.50%) (7.50%)    
Income tax expense 50.70% 50.70%    
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent (0.50%) (0.50%)    
PRC [Member]        
Income Taxes And Tax Related [Line Items]        
Provision for income tax ¥ 205,800      
Income Taxes Percent [Abstract]        
PRC statutory tax rate 25.00% 25.00% 25.00% 25.00%