Income Taxes (Tables)

12 Months Ended

Dec. 31, 2012

Income Taxes [Abstract]

Schedule Of Components Of Income And Loss From Continuing Operations Before Income Taxes

	2012	2011	2010
Domestic	$        559,536	$        244,401	$        124,463
Foreign	48,626	792	7,114
	$        608,162	$        245,193	$        131,577

Schedule Of Components Of Income Tax Expense (Benefit)

	2012	2011	2010
Current:
Federal	$        116,774	$          14,227	$          15,791
State	14,025	785	1,874
Foreign	33,280	19,716	17,628
	164,079	34,728	35,293
Deferred:
Federal	59,442	51,828	13,897
State	1,117	1,121	(761)
Foreign	382	(1,873)	(2,998)
	60,941	51,076	10,138
	$        225,020	$          85,804	$          45,431

Schedule Of Effective Income Tax Rate Reconciliation

	2012	2011	2010
Computed expected tax expense	$      212,857	$        85,818	$        46,052
Increase (decrease) resulting from
State and foreign income taxes	15,046	(2,106)	1,839
Other	(2,883)	2,092	(2,460)
Income tax	$      225,020	$        85,804	$        45,431

Schedule Of Deferred Tax Assets and Liabilities

	2012	2011
Deferred tax assets:
Allowance for doubtful accounts	$            9,701	$            9,054
Operating loss and tax credit carryforwards	18,020	24,101
Compensation and employee benefits	49,136	28,305
Decommissioning liabilities	28,246	39,638
Other	47,353	35,005
	152,456	136,103
Valuation allowance	-	-
Net deferred tax assets	152,456	136,103
Deferred tax liabilities:
Property, plant and equipment	650,778	317,033
Notes receivable	14,085	25,599
Goodwill and other intangible assets	145,296	22,432
Deferred revenue on long-term contracts	4,329	47,341
Other	48,992	21,987
Deferred tax liabilities	863,480	434,392
Net deferred tax liability	$        711,024	$        298,289

Net Deferred Tax Liabilities Classified In The Consolidated Balance Sheet

	2012	2011
Deferred tax assets:
Current deferred income taxes	$          34,120	$                    -
Deferred tax liabilities:
Current deferred income taxes	-	(831)
Non-current deferred income taxes	(745,144)	(297,458)
Net deferred tax liability	$       (711,024)	$       (298,289)

Summary Of Activity In Unrecognized Tax Benefits

	2012	2011	2010
Unrecognized tax benefits,
December 31, 2011, 2010 and 2009, respectively	$       21,692	$       24,760	$       11,013
Additions based on tax positions related to current year	-	-	36
Additions based on tax positions related to prior years	6,873	871	16,607
Reductions based on tax positions related to prior years	(2,166)	(3,939)	(2,896)
Unrecognized tax benefits,
December 31, 2012, 2011 and 2010, respectively	$       26,399	$       21,692	$       24,760