Interim Financial Information (Unaudited) (Tables)

12 Months Ended

Dec. 31, 2012

Interim Financial Information (Unaudited) [Abstract]

Schedule Of Interim Financial Information

	Three Months Ended
	March 31	June 30	Sept. 30	Dec. 31
2012
Revenues	$    966,837	$  1,243,319	$  1,179,665	$  1,178,247
Less:
Cost of services, rentals and sales	546,767	711,284	708,608	722,814
Depreciation, depletion, amortization
and accretion	102,596	135,516	128,160	143,009
Gross profit	317,474	396,519	342,897	312,424
Net income from continuing operations	70,157	142,823	93,887	76,275
Income (loss) from discontinued
operations, net of tax	(16,237)	(970)	-	-
Earnings per share from
continuing operations:
Basic	$          0.56	$           0.91	$           0.60	$           0.50
Diluted	0.55	0.90	0.59	0.50
Discontinued operations:
Basic	$         (0.13)	$          (0.01)	$                 -	$                 -
Diluted	(0.13)	(0.01)	-	-
	Three Months Ended
	March 31	June 30	Sept. 30	Dec. 31
2011
Revenues	$    384,997	$     479,893	$     537,042	$     562,400
Less:
Cost of services, rentals and sales	217,022	250,667	285,124	293,596
Depreciation, depletion, amortization
and accretion	55,824	60,020	61,807	67,264
Gross profit	112,151	169,206	190,111	201,540
Net income from continuing operations	9,877	41,375	54,799	53,338
Income (loss) from discontinued
operations, net of tax	5,626	6,734	4,781	(33,976)
Earnings per share from
continuing operations:
Basic	$          0.12	$           0.52	$           0.69	$           0.67
Diluted	0.12	0.51	0.67	0.67
Discontinued operations:
Basic	$          0.07	$           0.08	$           0.06	$          (0.42)
Diluted	0.07	0.08	0.06	(0.42)