Note 2 - Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Notes Tables

Property, Plant and Equipment [Table Text Block]

	2016			2015			Estimated Life (Years)
Land	$	126,123		$	134,246			-
Buildings and improvements		377,070			313,706		10	-	39
Leasehold improvements		26,925			28,149		2	-	39
Machinery and shop equipment		67,558			59,455		5	-	20
Furniture, fixtures and computers		73,912			74,201		3	-	15
Transportation equipment		73,156			74,761		2	-	15
Lease and rental vehicles		832,661			825,787		2	-	8
Construction in progress		11,921			66,338
Accumulated depreciation and amortization		(453,521	)		(403,819	)
Total	$	1,135,805		$	1,172,824

Schedule of Goodwill [Table Text Block]

Balance December 31, 2014	$	265,145
Acquisitions and adjustments		19,896
Balance December 31, 2015		285,041
Acquisitions and adjustments		5,150
Balance December 31, 2016	$	290,191

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

	2016			2015			2014
Expected stock volatility		35.63	%		40.90	%		51.51	%
Weighted-average stock volatility		35.63	%		40.90	%		51.51	%
Expected dividend yield		0.00	%		0.00	%		0.00	%
Risk-free interest rate		1.64	%		1.74	%		2.14	%
Expected life (years)		6.0			6.0			6.5
Weighted-average fair value of stock options granted	$	6.54		$	11.27		$	15.86