Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 2,424,706	$ 2,066,084	$ 1,869,275
Cost of services and products	2,025,735	1,758,707	1,605,210
Gross Margin	398,971	307,377	264,065
Selling, general and administrative expense	217,643	196,514	224,266
Income from Operations	181,328	110,863	39,799
Interest income	15,425	5,708	2,477
Interest expense, net of amounts capitalized	(36,523)	(38,215)	(38,810)
Equity earnings of unconsolidated affiliates	2,061	1,707	594
Other Nonoperating Expense	(1,236)	1,011	9,769
Income before Income Taxes	161,055	79,052	(5,709)
Income Tax Expense (Benefit)	63,652	53,111	43,598
Net Income	$ 97,403	$ 25,941	$ (49,307)
Basic Earnings per Share	$ 0.97	$ 0.26	$ (0.49)
Weighted Average Number of Shares Outstanding, Basic	100,697	100,185	99,706
Diluted Earnings per Share	$ 0.95	$ 0.26	$ (0.49)
Weighted Average Number of Shares Outstanding, Diluted	102,156	101,447	99,706