Provision for income taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Federal	$ 305	$ (2,667)	$ (8,225)
State	1,826	(213)	(7,799)
Current income tax expense	2,131	(2,880)	(16,024)
Deferred	7,941	5,995	22,130
Total	$ 10,072	$ 3,115	$ 6,106