Debt - Maturities of debt obligations (Details) - USD ($) $ in Thousands		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Maturities of debt obligations
1-3 years		$ 911,000
More than 5 years		352,500
Total debt obligations		1,263,500	$ 1,395,500
2019-1 Notes
Maturities of debt obligations
More than 5 years		352,500
Total debt obligations		352,500	352,500
March 2026 Notes
Maturities of debt obligations
1-3 years		300,000
Total debt obligations		300,000	300,000	$ 300,000
October 2026 Notes
Maturities of debt obligations
1-3 years		300,000
Total debt obligations		300,000	300,000	$ 300,000
Sumitomo Credit Facility
Maturities of debt obligations
1-3 years		311,000
Total debt obligations	[1]	$ 311,000	$ 443,000

[1] On January 26, 2022, Gale Aviation (Offshore) Co investment, a controlled affiliate investment of the Company, entered into a letter of credit agreement with Sumitomo Mitsui Banking Corporation for $14.7 million. On October 2, 2023, $4.0 million of the letter of credit agreement was terminated. As of December 31, 2023, $10.7 million is outstanding on the letter of credit and the amount has been drawn against the total aggregate principal amount committed of the Sumitomo Credit Facility.