Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Summary Of Significant Accounting Policies [Abstract]

Reorganization Expenses

	December 31, 2020
7.125% Senior unsecured notes - unamortized debt issuance costs	$	2,160
7.750% Senior unsecured notes - unamortized debt issuance costs		5,644
Credit facility - unamortized debt issuance costs		2,172
Debtor in possession credit facility costs		1,554
Rejected leases		8,601
Professional fees		1,485
Total	$	21,616

Liabilities Subject to Compromise

	December 31, 2020
7.125% Senior unsecured notes due 2021	$	800,000
7.750% Senior unsecured notes due 2024		500,000
Accrued interest on senior notes		35,794
Total	$	1,335,794

Schedule Of Inventory

	December 31, 2020		December 31, 2019
Finished goods	$	44,123	$	45,127
Raw materials		11,345		16,130
Work-in-process		6,185		9,360
Supplies and consumables		25,070		33,322
Total	$	86,723	$	103,939

Estimated Useful Lives Of The Related Assets

Buildings and improvements	5	to	40	years
Machinery and equipment	2	to	25	years
Automobiles, trucks, tractors and trailers	3	to	10	years
Furniture and fixtures	2	to	10	years

Summary Of Activity Of Goodwill

	Drilling
	Products
	and Services		Total
Balance, December 31, 2018	$	136,788	$	136,788
Foreign currency translation adjustment		907		907
Balance, December 31, 2019		137,695		137,695
Foreign currency translation adjustment		982		982
Balance, December 31, 2020	$	138,677	$	138,677

Composition Of Intangible And Other Long-term Assets

		December 31,
		2020						2019
	Estimated	Gross		Accumulated		Net		Gross		Accumulated		Net
	Useful Lives	Amount		Amortization		Balance		Amount		Amortization		Balance
Customer relationships	17 years	$	14,592	$	(10,077)	$	4,515	$	19,902	$	(14,680)	$	5,222
Tradenames	10 years		9,045		(6,270)		2,775		8,907		(5,413)		3,494
Non-compete agreements	3 years		3,478		(3,478)		-		3,464		(3,106)		358
Total		$	27,115	$	(19,825)	$	7,290	$	32,273	$	(23,199)	$	9,074

Summary Of The Activity For Company's Decommissioning Liabilities

	December 31,
	2020		2019
Balance at beginning of period	$	136,281	$	130,096
Accretion		6,945		6,332
Liabilities settled		(480)		(147)
Balance at end of period	$	142,746	$	136,281