Consolidated Statements Of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Revenue	$ 416,413	$ 446,176
Cost of services and products	397,585	401,321
Gross Margin	18,828	44,855
Selling, general and administrative expense	45,977	45,005
Income from Operations	(27,149)	(150)
Interest income	2,592	1,337
Interest expense	(9,371)	(6,268)
Equity earnings (losses) of unconsolidated affiliates	(843)	(980)
Other income (expense), net	(8,474)	(2,556)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	(43,245)	(8,617)
Provision for income taxes	5,888	(1,083)
Net Income	$ (49,133)	$ (7,534)
Cash Dividends declared per Share	$ 0.00	$ 0.15
Basic Earnings per Share	$ (0.50)	$ (0.08)
Weighted Average Number of Shares Outstanding, Basic	98,383	98,138
Diluted Earnings per Share	$ (0.50)	$ (0.08)
Weighted Average Number of Shares Outstanding, Diluted	98,383	98,138