Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Stock-based compensation	$ 2,084	$ 2,290
Pension	8,694	0
Deferred compensation	13,325	5,976
Warranty	10,848	11,246
Inventory	7,443	8,001
Other	6,390	2,585
Lease obligation asset	22,488	25,055
Net operating loss and interest carryforwards	4,857	7,352
Total deferred tax assets	76,129	62,505
Less: Valuation allowance - foreign	(2,809)	(1,662)
Total deferred tax assets net of valuation allowance	73,320	60,843
Lease obligation liability	(21,523)	(24,368)
Fixed assets	(35,637)	(27,898)
Intangible assets	(69,992)	(44,317)
Total deferred tax liabilities	(127,152)	(96,583)
Deferred Tax Liabilities, Net	$ (53,832)	$ (35,740)