Income taxes - Schedule of Current and Deferred Income Tax (Benefit) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Current:
U.S. federal tax	$ 6,967	$ 18,862	$ 47,880
State and local tax	2,137	8,068	18,331
Non-U.S. operations	937	1,129	258
Total Current	10,041	28,059	66,469
Deferred:
U.S. federal tax	5,207	(10,420)	(1,745)
State and local tax	919	(4,538)	790
Non-U.S. operations	331	343	163
Total Deferred	6,457	(14,615)	(792)
Total income taxes	$ 16,498	$ 13,444	$ 65,677