Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Income Taxes [Abstract]

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

	Years ended December 31,
	2019		2018		2017
Domestic	$	(81,443)	$	(448,575)	$	(270,221)
Foreign		(936)		(21,831)		(41,656)
	$	(82,379)	$	(470,406)	$	(311,877)

Schedule Of Components Of Income Tax Expense (Benefit)

	Years ended December 31,
	2019		2018		2017
Current:
Federal	$	-	$	-	$	-
State		1,573		2,118		(750)
Foreign		(3,359)		14,856		9,137
		(1,786)		16,974		8,387
Deferred:
Federal		1,792		(66,039)		(142,590)
State		1,622		(4,161)		6,109
Foreign		(6,254)		10,223		(3,468)
		(2,840)		(59,977)		(139,949)
	$	(4,626)	$	(43,003)	$	(131,562)

Schedule Of Effective Income Tax Rate Reconciliation

	Years ended December 31,
	2019		2018		2017
Computed expected tax benefit	$	(17,513)	$	(98,785)	$	(109,157)
Increase (decrease) resulting from
State and foreign income taxes		4,019		10,437		16,437
Reduction in value of assets		(233)		27,680		-
U.S. Tax Reform		-		-		(39,603)
Other		9,101		17,665		761
Income tax benefit	$	(4,626)	$	(43,003)	$	(131,562)

Schedule Of Deferred Tax Assets and Liabilities

	December 31,
	2019		2018
Deferred tax assets:
Allowance for doubtful accounts	$	1,291	$	856
Operating loss and tax credit carryforwards		136,647		146,926
Compensation and employee benefits		35,532		38,006
Decommissioning liabilities		29,405		27,979
Operating leases		1,002		-
Other		24,903		25,331
		228,780		239,098
Valuation allowance		(84,741)		(25,571)
Net deferred tax assets		144,039		213,527
Deferred tax liabilities:
Property, plant and equipment		114,024		146,971
Notes receivable		12,977		12,977
Goodwill and other intangible assets		20,285		38,955
Other		-		14,624
Deferred tax liabilities		147,286		213,527
Net deferred tax liability	$	3,247	$	-

Summary Of Activity In Unrecognized Tax Benefits

	Years ended December 31,
	2019		2018		2017
Unrecognized tax benefits at beginning of period	$	30,558	$	30,656	$	29,956
Additions based on tax positions related to prior years		2,500		1,899		5,576
Reductions based on tax positions related to prior years		-		(1,864)		(4,671)
Reductions as a result of a lapse of the applicable statute of limitations		-		(133)		(205)
Reductions relating to settlements with taxing authorities		(19,852)		-		-
Unrecognized tax benefits at end of period	$	13,206	$	30,558	$	30,656