Emergence from Voluntary Reorganization under Chapter 11 / Fresh Start Accounting Fresh Start Accounting Adjustments - Fair Value Adjustment - Property and Equipment (Details) - USD ($) $ in Thousands	May 31, 2020	May 30, 2020
Fresh-Start Adjustment [Line Items]
Drilling and equipment	$ 178,318	$ 1,010,612
Vehicles	12,722	41,283
Buildings and improvements	2,877
Office equipment	488	12,231
Land	1,566	1,959
Property and equipment, at cost	195,971	1,082,704
Less accumulated depreciation	0	(655,512)
Net property and equipment	$ 195,971	427,192
Fresh Start Accounting Adjustments [Member]
Fresh-Start Adjustment [Line Items]
Drilling and equipment		(832,294)
Vehicles		(28,561)
Buildings and improvements		(13,742)
Office equipment		(11,743)
Land		(393)
Property and equipment, at cost		(886,733)
Less accumulated depreciation		655,512
Net property and equipment		(231,221)
Building and improvements
Fresh-Start Adjustment [Line Items]
Buildings and improvements		$ 16,619