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Notes to the Consolidated Statements of Cash Flows - Additional Information (Detail) - USD ($)
 1 Months Ended 12 Months Ended
Jan. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Other Receivables [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Value of consideration received non cash transaction   $ 388,972,000    
Common Class B [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Stock repurchased during the period shares   4,773,270 36,923,963 69,144,673
Common Class A [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Stock repurchased during the period shares   0 0 0
Common Class A [Member] | Private Investor [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Stock repurchased during the period shares     5,852,805  
Stock repurchased during the period value     $ 4,280  
Common Class A [Member] | Convertible Debt [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Stock Issued During Period, Shares, Conversion of Convertible Securities 1,856,436   1,856,436  
Financial Assets At Fair Value Through Profit Or Loss [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Consideration payable through current accounts of the group       $ 20,930,000
Purchase of financial assets a fair value through profit or loss       20,930,000
Listed Equity Investment [Member] | Common Class A [Member] | Private Investor [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Value of consideration received non cash transaction     $ 25,050,000  
One Of The Former Fellow Subsidiaries [Member] | Underlying Securities For The Other Equity Linked Note [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Disposal of equity linked notes consideration receivable through current accounts       23,365,000
Gain loss on sale of investments       15,322,000
One Of The Former Fellow Subsidiaries [Member] | Financial Assets At Fair Value Through Profit Or Loss [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Gain loss on sale of investments       772,000
Disposal of financial assets at fair value through profit or loss consideration receivable through current accounts       25,145,000
Consideration payable through current accounts of the group       $ 25,145,000
AMTD Group [Member] | Common Class B [Member]        
Cash Flow Supplemental Disclosures [Line Items]        
Stock repurchased during the period shares   4,773,270 36,923,963 69,144,673
Stock repurchased during the period value   $ 40,000,000 $ 320,603,000 $ 642,055,000
Payable for the repurchase of shares through current accounts of the group   $ 40,000,000 $ 320,603,000 $ 642,055,000