Income Taxes Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Assets, Gross [Abstract]
Warranty, insurance and other accruals	$ 8,114	$ 8,218
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost	2,109	4,096
Inventory	4,254	4,441
Deferred Tax Asset, Operating Lease Liabilities	4,613	0
State taxes	213	185
Net operating loss carryforward	754	3,240
Deferred charges	426	0
Total deferred tax assets	20,483	20,180
Deferred Tax Liabilities, Gross [Abstract]
Federal effect of state deferred taxes	476	1,079
Depreciation	5,288	4,801
Deferred Tax Liability, Operating Lease Right-of-Use Assets	4,613	0
Prepaid expenses	475	285
Deferred Tax Liabilities, Other	0	533
Total deferred tax liabilities	10,852	6,698
Deferred Tax Assets, Net of Valuation Allowance	$ 9,631	$ 13,482