Consolidated Statements of Income and Comprehensive Income (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues
Revenue	$ 1,225,882	$ 1,288,884
Lease and rental	60,781	59,433
Total revenue	1,286,663	1,348,317
Cost of products sold
Lease and rental	52,208	49,795
Total cost of products sold	1,052,162	1,091,401
Gross profit	234,501	256,916
Selling, general and administrative expense	185,074	187,181
Depreciation and amortization expense	14,330	12,925
Gain on sale of assets	100	57
Operating income	35,197	56,867
Other income	1
Equity in earnings of unconsolidated entities	1,240	49
Interest expense, net	4,769	7,358
Income before taxes	31,669	49,558
Income tax provision	8,562	12,454
Net income	$ 23,107	$ 37,104
Earnings per common share:
Basic (in dollars per share)	$ 0.63	$ 1.01
Diluted (in dollars per share)	$ 0.62	$ 0.98
Weighted average shares outstanding:
Basic (in shares)	36,485	36,817
Diluted (in shares)	37,326	37,834
Dividends declared per common share (in dollars per share)	$ 0.13	$ 0.12
Comprehensive income	$ 21,177	$ 37,488
New and Used Commercial Vehicle [Member]
Revenues
Revenue	789,554	838,283
Cost of products sold
Cost of products sold	728,539	768,417
Parts and Service [Member]
Revenues
Revenue	427,978	438,354
Cost of products sold
Cost of products sold	271,415	273,189
Finance and Insurance [Member]
Revenues
Revenue	4,467	6,610
Product and Service, Other [Member]
Revenues
Revenue	$ 3,883	$ 5,637