Segment Information (Schedule of Segment Reporting Information) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Identifiable assets	$ 750,524	$ 1,004,897	$ 750,524	$ 1,004,897	$ 821,993
Drilling Services Revenue	27,959	58,559	61,143	156,974
Drilling Services Costs and Expenses	14,773	32,815	32,213	95,111
Production Services Revenue	34,331	76,452	76,099	171,851
Production Services Costs and Expenses	28,742	53,106	63,591	121,874
Revenues	62,290	135,011	137,242	328,825
Operating Costs	43,515	85,921	95,804	216,985
Segment Margin	18,775	49,090	41,438	111,840
Depreciation and amortization	28,922	38,489	58,746	80,271
Capital Expenditures	8,469	46,344	13,962	95,160
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	15,441	28,485	15,441	28,485
Revenues	0	0	0	0
Operating Costs	0	0	0	0
Segment Margin	0	0	0	0
Depreciation and amortization	326	346	658	695
Capital Expenditures	79	14	175	317
Drilling Services Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	478,799	564,529	478,799	564,529
Segment Margin	13,186	25,744	28,930	61,863
Depreciation and amortization	15,408	20,815	31,086	44,415
Capital Expenditures	5,437	42,634	7,545	75,690
Production Services Segment [Member]
Segment Reporting Information [Line Items]
Identifiable assets	256,284	411,883	256,284	411,883
Segment Margin	5,589	23,346	12,508	49,977
Depreciation and amortization	13,188	17,328	27,002	35,161
Capital Expenditures	$ 2,953	$ 3,696	$ 6,242	$ 19,153