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Concentration of Risk - Regional Concentration Based on Net Book Value (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Concentration Risk [Line Items]    
Net Book Value $ 24,538,385 $ 22,899,004
Net Assets, Geographic Area | Geographic Region    
Concentration Risk [Line Items]    
Net Book Value $ 24,538,385 $ 22,899,004
% of Total 100.00% 100.00%
Net Assets, Geographic Area | Geographic Region | Europe    
Concentration Risk [Line Items]    
Net Book Value $ 7,985,317 $ 7,439,993
% of Total 32.50% 32.50%
Net Assets, Geographic Area | Geographic Region | Asia (excluding China)    
Concentration Risk [Line Items]    
Net Book Value $ 7,144,188 $ 5,952,981
% of Total 29.10% 26.00%
Net Assets, Geographic Area | Geographic Region | China    
Concentration Risk [Line Items]    
Net Book Value $ 2,792,022 $ 2,934,224
% of Total 11.40% 12.80%
Net Assets, Geographic Area | Geographic Region | The Middle East and Africa    
Concentration Risk [Line Items]    
Net Book Value $ 2,253,342 $ 2,447,919
% of Total 9.30% 10.70%
Net Assets, Geographic Area | Geographic Region | Central America, South America, and Mexico    
Concentration Risk [Line Items]    
Net Book Value $ 1,924,216 $ 1,566,133
% of Total 7.80% 6.80%
Net Assets, Geographic Area | Geographic Region | U.S. and Canada    
Concentration Risk [Line Items]    
Net Book Value $ 1,557,260 $ 1,638,450
% of Total 6.30% 7.20%
Net Assets, Geographic Area | Geographic Region | Pacific, Australia, and New Zealand    
Concentration Risk [Line Items]    
Net Book Value $ 882,040 $ 919,304
% of Total 3.60% 4.00%