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Shareholder's equity (Details) - USD ($)
$ in Thousands
 2 Months Ended 12 Months Ended
Feb. 21, 2023
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Dec. 17, 2021
Dec. 10, 2020
Stock repurchases            
Repurchase of common stock (in shares)   8,095,000 13,877,000 16,477,000    
Terminated Remaining Prior Share Repurchases Authorized, Amount           $ 329,302
Stock Repurchase Program, Authorized Amount         $ 2,000,000 $ 2,000,000
Charter documents and Delaware law:            
Preferred stock, shares authorized (in shares)   5,000,000 5,000,000      
Period During Which The Company Is Subject To Section 203 Of The Delaware General Corporation Law Limitation   3 years        
Payments to Noncontrolling Interests   $ 20,775 $ 20,104 $ 7,831    
Treasury stock            
Stock repurchases            
Repurchase of common stock (in shares)   8,095,000 13,877,000 16,477,000    
Retirement of treasury stock (in shares)   (8,095,000) (13,877,000) (16,477,000)    
Subsequent Event            
Stock repurchases            
Repurchase of common stock (in shares) 0          
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 1,596,085