v3.20.4
Equity Method Investments - Additional information (Detail) - USD ($)
$ in Thousands
1 Months Ended 12 Months Ended
Nov. 30, 2019
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]        
Payments made to acquire equity method investments   $ 2,934 $ 25,868 $ 0
Service Credit Utilized   4,200 0  
Palantir Technologies Japan, K.K. [Member]        
Schedule of Equity Method Investments [Line Items]        
Number of shares purchased 100,000      
Payments made to acquire equity method investments $ 25,000      
Equity method investment ownership percentage 50.00%      
Initial investment recorded $ 900   25,900  
Share of profits or losses recorded   $ (1,700)    
Palantir Technologies Japan, K.K. [Member] | License and Service [Member]        
Schedule of Equity Method Investments [Line Items]        
License and services agreement Term 10 years      
Palantir Technologies Japan, K.K. [Member] | Service Credit [Member]        
Schedule of Equity Method Investments [Line Items]        
Service Credit recognition expiry period 5 years      
Palantir Technologies Japan, K.K. [Member] | Usage Of Trademark [Member] | License and Service [Member]        
Schedule of Equity Method Investments [Line Items]        
Amount received in exchange for usage of trademark     25,000  
Prepayment Amount received     $ 50,000  
SOMPO [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity method investment ownership percentage 50.00%      
Percentage Of Share Of Profits Or Losses Generated [Member]        
Schedule of Equity Method Investments [Line Items]        
Equity Method Investment, Additional Information   The Company’s 50% share of profits or losses generated from Palantir Japan are reported on a quarter lag.