Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Supplemental Cash Flow Information [Abstract]
Interest paid	$ 18,200	$ 5,855	$ 4,929
Supplemental cash flow information
Income taxes paid, net	29,677	18,367	34,094
Noncash transactions:
Debt issued for purchases of businesses	(7,046)	(7,445)	(2,961)
Detail of acquisitions:
Cash	249	1,365	292
Accounts receivable	211	10,794	509
business combination recognized identifiable assets acquired and liabilities assumed operating supplies	1,538	48	1,044
Operating supplies	0	6,351	0
Prepaid expense	141	126	203
Equipment	7,220	2,309	4,049
Other assets	2,658	412	1,574
Intangible assets	7,302	10,569	3,005
Goodwill	14,758	14,255	7,723
Liabilities assumed	5,285	15,592	3,713
Cash paid	$ 21,746	$ 23,192	$ 11,725