Summary of Significant Accounting Policies - Cost and Carrying Value of Property and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Cost	$ 143,587	$ 133,461
Accumulated Depreciation and Amortization	(79,857)	(72,900)
Carrying Value	63,730	60,561
Sales facilities
Property, Plant and Equipment [Line Items]
Cost	76,171	67,947
Accumulated Depreciation and Amortization	(36,113)	(31,644)
Carrying Value	40,058	36,303
Airplane
Property, Plant and Equipment [Line Items]
Cost	31,230	31,230
Accumulated Depreciation and Amortization	(12,150)	(11,481)
Carrying Value	19,080	19,749
Computer software and equipment
Property, Plant and Equipment [Line Items]
Cost	24,072	23,690
Accumulated Depreciation and Amortization	(22,260)	(21,367)
Carrying Value	1,812	2,323
Leasehold improvements
Property, Plant and Equipment [Line Items]
Cost	8,884	7,783
Accumulated Depreciation and Amortization	(7,095)	(6,522)
Carrying Value	1,789	1,261
Other
Property, Plant and Equipment [Line Items]
Cost	3,230	2,811
Accumulated Depreciation and Amortization	(2,239)	(1,886)
Carrying Value	$ 991	$ 925