Supplemental Cash Flow Information (Tables)

12 Months Ended

Dec. 31, 2021

Supplemental Cash Flow Information [Abstract]

Supplemental cash flow information

Supplemental cash flow information follows:

	Year Ended December 31,
Supplemental cash flow information	2021		2020		2019
Interest paid	$	4,929	$	7,159	$	8,463
Income taxes paid, net	34,094		27,494		5,758
Noncash transactions:
Debt issued for purchases of businesses	$	2,961	$	2,472	$	2,612
Detail of acquisitions:
Assets acquired:
Cash	$	292	$	—	$	3
Accounts receivable	509		10		2,332
Operating supplies	1,044		22		84
Prepaid expense	203		6		27
Equipment	4,049		1,932		1,837
Other assets	1,574		—		96
Intangible assets	3,005		3,545		4,067
Goodwill	7,723		5,635		4,174
Liabilities assumed	(3,713)		(613)		(1,479)
Debt issued for purchases of businesses	(2,961)		(2,472)		(2,612)
Cash paid	$	11,725	$	8,065	$	8,529