Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue	$ 743,613	$ 973,089	$ 2,340,688	$ 2,740,697
Cost of services and products	575,300	731,234	1,841,381	2,091,136
Gross Margin	168,313	241,855	499,307	649,561
Selling, general and administrative expense	54,849	59,937	171,253	173,470
Income from Operations	113,464	181,918	328,054	476,091
Interest income	229	130	436	250
Interest expense	(6,396)	(677)	(18,696)	(1,486)
Equity earnings (losses) of unconsolidated affiliates	1,567	9	1,313	(19)
Other income (expense), net	(9,099)	(392)	(14,883)	(515)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	99,765	180,988	296,224	474,321
Provision for income taxes	31,226	56,650	92,718	148,463
Net Income	$ 68,539	$ 124,338	$ 203,506	$ 325,858
Cash Dividends declared per Share	$ 0.27	$ 0.27	$ 0.81	$ 0.76
Basic Earnings per Share	0.70	1.16	2.06	3.03
Diluted Earnings per Share	$ 0.70	$ 1.16	$ 2.06	$ 3.01