Debt - Interest expense on 2018-1 Notes (Details) - 2018-1 Notes - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Components of interest expense
Borrowing interest expense	$ 0	$ 1,299	$ 8,026
Amortization of deferred financing costs and upfront commitment fees	0	28	174
Total interest and debt financing expenses	$ 0	$ 1,327	$ 8,200