Consolidated Statements Of Income - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenue	$ 810,303	$ 927,407	$ 1,597,075	$ 1,767,608
Cost of services and products	642,758	709,192	1,266,081	1,359,902
Gross Margin	167,545	218,215	330,994	407,706
Selling, general and administrative expense	59,605	56,904	116,404	113,533
Income from Operations	107,940	161,311	214,590	294,173
Interest income	51	41	207	120
Interest expense	(6,212)	(398)	(12,300)	(809)
Equity earnings (losses) of unconsolidated affiliates	1	8	(254)	(28)
Other income (expense), net	(6,484)	(417)	(5,784)	(123)
Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest	95,296	160,545	196,459	293,333
Provision for income taxes	29,828	50,250	61,492	91,813
Net Income	$ 65,468	$ 110,295	$ 134,967	$ 201,520
Cash Dividends declared per Share	$ 0.27	$ 0.27	$ 0.54	$ 0.49
Basic Earnings per Share	0.66	1.02	1.36	1.86
Diluted Earnings per Share	$ 0.66	$ 1.02	$ 1.36	$ 1.86