Segment Information (Schedule of Segment Reporting Information) (Details) $ in Thousands		3 Months Ended				4 Months Ended		5 Months Ended	9 Months Ended
		Sep. 30, 2020 USD ($) drilling_rigs		Sep. 30, 2019 USD ($) drilling_rigs		Sep. 30, 2020 USD ($) drilling_rigs		May 31, 2020 USD ($)	Sep. 30, 2019 USD ($) drilling_rigs		Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenues		$ 38,998		$ 146,398		$ 50,161		$ 142,370	$ 445,809
Operating costs		28,893		108,059		37,636		114,047	332,614
Segment/Consolidated Margin		10,105		38,339		12,525		28,323	113,195
Identifiable assets		319,102		689,693		319,102		352,623	689,693		$ 673,954
Depreciation and amortization		14,699		22,924		19,935		35,647	68,428
Capital Expenditures		1,531		8,660		2,243		8,924	36,276
Intercompany receivable (payable)		0				0					$ 0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets		59,193		54,760		59,193		65,057	54,760
Depreciation and amortization		103		219		227		373	709
Capital Expenditures		0		44		0		21	541
Drilling Services [Member]
Segment Reporting Information [Line Items]
Revenues		21,628		59,785		28,322		69,269	184,511
Operating costs		13,155		37,775		17,864		46,777	119,982
Segment/Consolidated Margin		8,473		22,010		10,458		22,492	64,529
Identifiable assets		187,466		401,854		187,466		207,894	401,854
Depreciation and amortization		9,437		12,376		12,525		20,202	36,525
Capital Expenditures		$ 1,173		3,939		$ 1,795		5,135	17,788
Drilling Rigs | drilling_rigs		25				25
Drilling Services [Member] | Domestic Drilling [Member]
Segment Reporting Information [Line Items]
Revenues		$ 17,567		38,168		$ 23,433		53,341	115,829
Operating costs		9,706		21,931		13,352		33,101	69,098
Segment/Consolidated Margin		7,861		16,237		10,081		20,240	46,731
Identifiable assets		144,433	[1]	354,534	[1]	144,433	[1]	158,283	354,534	[1]
Depreciation and amortization		6,195		10,864		8,207		18,058	32,297
Capital Expenditures		1,006		2,777		1,490		3,862	14,344
Intercompany receivable (payable)		28,300		37,500		28,300			37,500
Drilling Services [Member] | International Drilling [Member]
Segment Reporting Information [Line Items]
Revenues		4,061		21,617		4,889		15,928	68,682
Operating costs		3,449		15,844		4,512		13,676	50,884
Segment/Consolidated Margin		612		5,773		377		2,252	17,798
Identifiable assets	[2]	43,033	[1]	47,320	[1]	43,033	[1]	49,611	47,320	[1]
Depreciation and amortization		3,242		1,512		4,318		2,144	4,228
Capital Expenditures		167		1,162		305		1,273	3,444
Intercompany receivable (payable)		$ 28,300		$ 37,500		$ 28,300			$ 37,500
Drilling Services [Member] | Drilling Rigs | International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs | drilling_rigs		5		5		5			5
Drilling Services [Member] | Assets Leased From Others [Member] | International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs | drilling_rigs		3		3		3			3
Production Services [Member]
Segment Reporting Information [Line Items]
Revenues		$ 17,370		$ 86,613		$ 21,839		73,101	$ 261,298
Operating costs		15,738		70,284		19,772		67,270	212,632
Segment/Consolidated Margin		1,632		16,329		2,067		5,831	48,666
Identifiable assets		72,443		233,079		72,443		79,672	233,079
Depreciation and amortization		5,159		10,329		7,183		15,072	31,194
Capital Expenditures		358		4,677		448		3,768	17,947
Production Services [Member] | Well Servicing [Member]
Segment Reporting Information [Line Items]
Revenues		12,871		30,293		16,627		31,947	86,053
Operating costs		10,577		21,414		13,387		26,877	61,348
Segment/Consolidated Margin		2,294		8,879		3,240		5,070	24,705
Identifiable assets		47,207		118,686		47,207		49,388	118,686
Depreciation and amortization		3,539		5,132		4,800		7,820	14,956
Capital Expenditures		313		2,146		343		1,918	8,182
Production Services [Member] | Wireline Services [Member]
Segment Reporting Information [Line Items]
Revenues		4,499		43,874		5,212		35,543	137,134
Operating costs		4,938		38,349		6,023		31,836	119,500
Segment/Consolidated Margin		(439)		5,525		(811)		3,707	17,634
Identifiable assets		21,174		80,054		21,174		23,948	80,054
Depreciation and amortization		1,620		3,537		2,383		5,088	11,519
Capital Expenditures		45		775		105		1,684	5,198
Production Services [Member] | Coiled Tubing Services [Member]
Segment Reporting Information [Line Items]
Revenues		0		12,446		0		5,611	38,111
Operating costs		223		10,521		362		8,557	31,784
Segment/Consolidated Margin		(223)		1,925		(362)		(2,946)	6,327
Identifiable assets		4,062		34,339		4,062		6,336	34,339
Depreciation and amortization		0		1,660		0		2,164	4,719
Capital Expenditures		$ 0		$ 1,756		$ 0		$ 166	$ 4,567

[1] Identifiable assets for our drilling segments include the impact of a $28.3 million and $37.5 million intercompany balance, as of September 30, 2020 and 2019, respectively, between our domestic drilling segment (intercompany receivable) and our international drilling segment (intercompany payable).

[2] Identifiable assets for our international drilling segment include five drilling rigs that are owned by our Colombia subsidiary and three drilling rigs that are owned by one of our domestic subsidiaries and leased to our Colombia subsidiary.