Selected Income Statement Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue:
Revenues	$ 2,424,706	$ 2,066,084	$ 1,869,275
Cost of Services and Products:
Cost of services and products	2,025,735	1,758,707	1,605,210
Gross margin:
Gross Profit	398,971	307,377	264,065
Service [Member]
Revenue:
Revenues	1,920,348	1,673,024	1,503,745
Cost of Services and Products:
Cost of services and products	1,498,094	1,334,811	1,215,994
Gross margin:
Gross Profit	422,254	338,213	287,751
Product [Member]
Revenue:
Revenues	504,358	393,060	365,530
Cost of Services and Products:
Cost of services and products	428,686	341,368	295,514
Gross margin:
Gross Profit	75,672	51,692	70,016
Unallocated Expenses Member
Cost of Services and Products:
Cost of services and products	98,955	82,528	93,702
Gross margin:
Gross Profit	$ (98,955)	$ (82,528)	$ (93,702)