Summary of Significant Accounting Policies - Cost and Carrying Value of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Cost	$ 181,728	$ 143,587
Accumulated Depreciation and Amortization	(99,510)	(79,857)
Carrying Value	82,218	63,730
Sales facilities
Property, Plant and Equipment [Line Items]
Cost	88,929	76,171
Accumulated Depreciation and Amortization	(52,647)	(36,113)
Carrying Value	36,282	40,058
Aircraft
Property, Plant and Equipment [Line Items]
Cost	54,317	31,230
Accumulated Depreciation and Amortization	(13,298)	(12,150)
Carrying Value	41,019	19,080
Computer software and equipment
Property, Plant and Equipment [Line Items]
Cost	25,617	24,072
Accumulated Depreciation and Amortization	(23,181)	(22,260)
Carrying Value	2,436	1,812
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	9,481	8,884
Accumulated Depreciation and Amortization	(7,747)	(7,095)
Carrying Value	1,734	1,789
Other
Property, Plant and Equipment [Line Items]
Cost	3,384	3,230
Accumulated Depreciation and Amortization	(2,637)	(2,239)
Carrying Value	$ 747	$ 991