Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

Significant Accounting Policies [Abstract]

Property, Plant and Equipment [Table Text Block]

Lives of the assets are as follows:
	Years
Land improvements and buildings	5-30
Furniture and fixtures	3-5
Shop and service equipment	3-10
Revenue equipment	5-7

Schedule of Calculation of Numerator and Denominator in Earnings Per Share [Table Text Block]

A reconciliation of the numerator (net income) and denominator (weighted average number of shares outstanding) of the basic and diluted earnings per share (“EPS”) for 2021, 2020, and 2019 is as follows (in thousands, except per share data):

	2021
	Net Income (numerator)		Shares (denominator)	Per Share Amount
Basic EPS	$	79,277	79,573	$	1.00
Effect of restricted stock	—		39
Diluted EPS	$	79,277	79,612	$	1.00

	2020
	Net Income (numerator)		Shares (denominator)	Per Share Amount
Basic EPS	$	70,806	81,388	$	0.87
Effect of restricted stock	—		56
Diluted EPS	$	70,806	81,444	$	0.87

	2019
	Net Income (numerator)		Shares (denominator)	Per Share Amount
Basic EPS	$	72,967	81,980	$	0.89
Effect of restricted stock	—		44
Diluted EPS	$	72,967	82,024	$	0.89