Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Net long-term deferred assets and (liabilities) relating to:
Allowance for credit losses and inventory reserves	$ 1,337	$ 625
Warranty accrual	4,184	3,675
Other accruals	4,814	1,406
Share-based compensation	7,440	7,568
Research & development expenses	11,265	0
Oklahoma investment credit carryforward	3,115	3,404
Other, net	2,339	4,112
Gross deferred income tax assets	34,494	20,790
Valuation allowance	(3,115)	(3,404)
Net deferred income tax assets	31,379	17,386
Property & equipment	(50,040)	(49,379)
Total deferred income tax liabilities	(50,040)	(49,379)
Net deferred income tax liabilities	$ 18,661	$ 31,993