Segment Information (Schedule of Segment Reporting Information) (Details) $ in Thousands	3 Months Ended
Mar. 31, 2020 USD ($) drilling_rigs	Mar. 31, 2019 USD ($) drilling_rigs	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Revenues	$ 114,322	$ 146,568
Operating costs	92,022	108,585
Segment/Consolidated Margin	22,300	37,983
Identifiable assets	615,734	737,091	$ 673,954
Depreciation	21,984	22,653
Capital Expenditures	7,861	18,375
Intercompany receivable (payable)	0		$ 0
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	42,199	56,319
Depreciation	227	280
Capital Expenditures	1	121
Drilling Services [Member]
Segment Reporting Information [Line Items]
Revenues	50,346	59,652
Operating costs	36,003	38,954
Segment/Consolidated Margin	14,343	20,698
Identifiable assets	387,703	421,804
Depreciation	12,206	11,888
Capital Expenditures	$ 4,408	10,000
Drilling Rigs \| drilling_rigs	25
Drilling Services [Member] \| Domestic Drilling [Member]
Segment Reporting Information [Line Items]
Revenues	$ 35,891	38,009
Operating costs	23,865	22,469
Segment/Consolidated Margin	12,026	15,540
Identifiable assets	336,260	377,239
Depreciation	10,905	10,545
Capital Expenditures	3,241	8,242
Intercompany receivable (payable)	32,900	42,500
Drilling Services [Member] \| International Drilling [Member]
Segment Reporting Information [Line Items]
Revenues	14,455	21,643
Operating costs	12,138	16,485
Segment/Consolidated Margin	2,317	5,158
Identifiable assets	51,443	44,565
Depreciation	1,301	1,343
Capital Expenditures	1,167	1,758
Intercompany receivable (payable)	$ (32,900)	$ (42,500)
Drilling Services [Member] \| Drilling Rigs \| International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs \| drilling_rigs	5	5
Drilling Services [Member] \| Assets Leased From Others [Member] \| International Drilling [Member]
Segment Reporting Information [Line Items]
Drilling Rigs \| drilling_rigs	3	3
Production Services [Member]
Segment Reporting Information [Line Items]
Revenues	$ 63,976	$ 86,916
Operating costs	56,019	69,631
Segment/Consolidated Margin	7,957	17,285
Identifiable assets	185,832	258,968
Depreciation	9,551	10,485
Capital Expenditures	3,452	8,254
Production Services [Member] \| Well Servicing [Member]
Segment Reporting Information [Line Items]
Revenues	25,616	26,254
Operating costs	20,951	18,896
Segment/Consolidated Margin	4,665	7,358
Identifiable assets	107,747	121,861
Depreciation	4,781	4,882
Capital Expenditures	1,717	3,895
Production Services [Member] \| Wireline Services [Member]
Segment Reporting Information [Line Items]
Revenues	33,133	45,874
Operating costs	28,284	39,347
Segment/Consolidated Margin	4,849	6,527
Identifiable assets	66,712	96,297
Depreciation	3,077	4,075
Capital Expenditures	1,572	2,835
Production Services [Member] \| Coiled Tubing Services [Member]
Segment Reporting Information [Line Items]
Revenues	5,227	14,788
Operating costs	6,784	11,388
Segment/Consolidated Margin	(1,557)	3,400
Identifiable assets	11,373	40,810
Depreciation	1,693	1,528
Capital Expenditures	$ 163	$ 1,524

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