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Acquisitions of Subsidiaries - Additional Information (Detail) $ / shares in Units, € in Thousands, $ in Thousands |  |  |  |  | 1 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | --- | ---
Feb. 06, 2023 USD ($) | Jan. 01, 2023 USD ($) | Apr. 20, 2022 USD ($) | Jan. 01, 2022 USD ($) | Aug. 31, 2022 $ / shares shares | Feb. 28, 2022 USD ($) $ / shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2023 EUR (€) shares | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Stock issued during period value purchase of assets |  |  |  |  |  |  | $ 3,154 |  |  |
Revenues |  |  |  |  |  |  | 130,914 |  | $ 175,171 | $ 179,815
Net income (loss) attributable to parent |  |  |  |  |  |  | 153,383 |  | 160,466 | $ 157,180
Business combination, bargain purchase, gain recognized, amount |  |  |  |  |  |  | 4,469 |  | 4,848 |
Payments to acquire businesses, gross |  |  |  |  |  |  |  |  | 62,800 |
Capital Reserve [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Stock issued during period value purchase of assets |  |  |  |  |  |  | 275,154 |  |  |
Treasury Stock, Common [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Stock issued during period value purchase of assets |  |  |  |  |  |  | $ (268,000) |  |  |
Amtd Assets [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition percentage of voting interests acquired |  |  |  |  | 96.10% |  | 100.00% |  |  |
Business combination, separately recognized transactions, additional disclosures, acquisition costs |  |  |  |  |  |  | $ 0 |  |  |
Payments to acquire businesses, gross |  |  |  |  |  |  | 0 |  |  |
Amtd Assets [Member] | Capital Reserve [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Stock issued during period value purchase of assets | $ 275,154 |  |  |  |  |  |  |  |  |
Amtd Assets [Member] | Treasury Stock, Common [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Payments for repurchase of equity |  |  |  |  |  |  | 268,000 |  |  |
Amtd Assets [Member] | Common Class B [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition equity interests issued or issuable number of shares issued | shares |  |  |  |  | 30,875,576 |  |  |  |  |
Business acquisition share price | $ / shares |  |  |  |  | $ 8.68 |  |  |  |  |
Lofficiel [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition percentage of voting interests acquired |  |  | 100.00% |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 4,700 |
Net income (loss) attributable to parent |  |  |  |  |  |  |  |  | 2,700 |
Business combination, bargain purchase, gain recognized, amount |  |  |  |  |  |  | 4,848 |  |  |
Business combination, acquired receivable, fair value |  |  |  |  |  |  | 1,855 |  |  |
Business combination, acquired receivables, gross contractual amount |  |  |  |  |  |  | $ 2,492 |  |  |
Business combination, separately recognized transactions, additional disclosures, acquisition costs |  |  |  |  |  |  |  |  | 0 |
Payments to acquire businesses, gross |  |  | $ 62,800 |  |  |  |  |  | 62,800 |
Business combination consideration transferred |  |  |  |  |  |  |  |  | 62,800 |
Lofficiel [Member] | AMTD Idea Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  | $ 177,000 |  |  |  |  |  |
Net income (loss) attributable to parent |  |  |  | $ 159,000 |  |  |  |  |  |
The Art Newspaper SA [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition equity interests issued or issuable number of shares issued | shares |  |  |  |  |  |  | 8,688,525 | 8,688,525 |  |
Net income (loss) attributable to parent |  |  |  |  |  |  | $ 45 |  |  |
Business combination, bargain purchase, gain recognized, amount |  |  |  |  |  |  | 4,469 |  |  |
Business combination, acquired receivables, gross contractual amount |  |  |  |  |  |  | 975 |  |  |
Business combination, separately recognized transactions, additional disclosures, acquisition costs |  |  |  |  |  |  | 0 |  | $ 0 |
Payments to acquire businesses, gross |  |  |  |  |  |  | 2,540 | € 2,888,888 |  |
Revenue from business combination |  |  |  |  |  |  | 2,000 |  |  |
Business combination consideration transferred |  |  |  |  |  |  | $ 16,831 |  |  |
The Art Newspaper SA [Member] | AMTD Idea Group [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Revenues |  | $ 135,000 |  |  |  |  |  |  |  |
Net income (loss) attributable to parent |  | $ 152,400 |  |  |  |  |  |  |  |
The Art Newspaper SA [Member] | AMTD Digital [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Business acquisition percentage of voting interests acquired |  |  |  |  |  | 82.70% |  |  |  |
Business acquisition equity interests issued or issuable number of shares issued | shares |  |  |  |  |  |  | 380,065 | 380,065 |  |
Fair value, investments, entities that calculate net asset value per share, percent equity securities |  |  |  |  |  | 14.40% |  |  |  |
Business acquisition share price | $ / shares |  |  |  |  |  | $ 8.38 |  |  |  |
Business combination, consideration transferred, equity interests issued and issuable |  |  |  |  |  | $ 993,000 |  |  |  |
The Art Newspaper SA [Member] | AMTD Digital [Member] | Capital Reserve [Member] |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |
Stock issued during period value purchase of assets |  |  |  |  |  | $ 774,197 |  |  |  |

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