UNAUDITED CONSOLIDATED STATEMENTS OF (LOSS) INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Service revenues	$ 657,221	$ 702,033	$ 1,962,071	$ 2,048,527
Product revenues	194,244	205,502	594,541	581,699
Total revenues	851,465	907,535	2,556,612	2,630,226
Cost of revenues (exclusive of items shown separately below)
Service revenues	440,261	478,434	1,333,443	1,402,409
Product revenues	158,146	168,685	497,633	495,060
Total cost of revenues	598,407	647,119	1,831,076	1,897,469
Selling, general and administrative expenses	99,701	114,464	334,394	365,546
Accretion of environmental liabilities	2,642	2,914	7,975	8,628
Depreciation and amortization	70,049	69,430	205,480	196,904
Goodwill impairment charge	123,414	0	123,414	0
(Loss) income from operations	(42,748)	73,608	54,273	161,679
Other income (expense)	613	(150)	4,136	2,030
Interest expense, net of interest income of $174, $96, $590 and $362, respectively	(19,494)	(19,326)	(58,430)	(58,784)
(Loss) income before provision for income taxes	(61,629)	54,132	(21)	104,925
Provision for income taxes	31,708	18,771	55,684	36,160
Net (loss) income	$ (93,337)	$ 35,361	$ (55,705)	$ 68,765
(Loss) earnings per share:
Basic (in USD per share)	$ (1.55)	$ 0.58	$ (0.92)	$ 1.14
Diluted (in USD per share)	$ (1.55)	$ 0.58	$ (0.92)	$ 1.13
Shares used to compute (loss) earnings per share - Basic	60,369	60,610	60,585	60,542
Shares used to compute (loss) earnings per share - Diluted	60,369	60,760	60,585	60,692