Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Notes Tables

Property, Plant and Equipment [Table Text Block]

	2020			2019			Estimated Life (Years)
Land	$	136,024		$	137,416				–
Buildings and improvements		495,808			474,106			10	–	39
Leasehold improvements		38,767			34,350			2	–	39
Machinery and shop equipment		87,090			82,594			5	–	20
Furniture, fixtures and computers		81,834			73,846			3	–	15
Transportation equipment		96,319			99,127			3	–	15
Lease and rental vehicles		905,465			968,121			1	–	8
Construction in progress		2,989			16,874
Accumulated depreciation and amortization		(640,577	)		(606,503	)
Total	$	1,203,719		$	1,279,931

Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	2020			2019			2018
Expected stock volatility		33.11	%		31.29	%		31.68	%
Weighted-average stock volatility		33.11	%		31.29	%		31.68	%
Expected dividend yield		1.20	%		1.13	%		0.00	%
Risk-free interest rate		0.80	%		2.45	%		2.69	%
Expected life (years)		6.0			6.0			6.0
Weighted-average fair value of stock options granted	$	6.36		$	8.37		$	10.31