Organization and Summary of Significant Accounting Policies (Details) (USD $)	0 Months Ended	3 Months Ended								3 Months Ended				9 Months Ended	3 Months Ended
	Jan. 19, 2011	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2012 Options Held [Member] Other Assets [Member]	Mar. 31, 2011 Options Held [Member] Other Income [Member]	Mar. 31, 2012 Other Current Assets [Member]	Mar. 31, 2012 Accrued Liabilities [Member]	Mar. 31, 2012 Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Drilling Services Division [Member] drilling_rigs	Mar. 30, 2012 Drilling Services Division [Member] drilling_rigs	Mar. 31, 2012 Drilling Services Division [Member] Term Contract [Member] drilling_rigs	Dec. 31, 2012 Production Services Division [Member] coiled_tubing_units well_service_rigs wireline_tubing_units	Mar. 31, 2012 Wireline Units [Member]	Apr. 20, 2012 South Texas [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 East Texas [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 West Texas [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 North Dakota [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Utah [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Appalachia [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Colombia [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Future Period Analysis [Member] Drilling Services Division [Member] Term Contract [Member] drilling_rigs	Apr. 20, 2012 Future Period Analysis [Member] Production Services Division [Member] well_service_rigs wireline_tubing_units coiled_tubing_units	Apr. 20, 2012 Estimated to Become Active in 9 Months [Member] Future Period Analysis [Member] Drilling Services Division [Member] drilling_rigs	Feb. 10, 2012 Estimated to Become Active Between 9 and 12 Months [Member] Future Period Analysis [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Idle [Member] Future Period Analysis [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Currently Under Drilling Contract [Member] Active [Member] Future Period Analysis [Member] Drilling Services Division [Member] drilling_rigs	Apr. 20, 2012 Currently Under Drilling Contract [Member] Active [Member] Future Period Analysis [Member] Drilling Services Division [Member] Term Contract [Member] drilling_rigs term_contracts	Apr. 20, 2012 550 Horsepower [Member] Future Period Analysis [Member] Production Services Division [Member] well_service_rigs	Apr. 20, 2012 600 Horsepower [Member] Future Period Analysis [Member] Production Services Division [Member] well_service_rigs	Apr. 20, 2012 400 Horsepower [Member] Future Period Analysis [Member] Production Services Division [Member] well_service_rigs	Apr. 20, 2012 Minimum [Member] Future Period Analysis [Member] Drilling Services Division [Member]	Apr. 20, 2012 Maximum [Member] Future Period Analysis [Member] Drilling Services Division [Member]
Restricted Cash and Cash Equivalents Items [Line Items]
Drilling Rigs										62	62	64				15	3	19	9	4	4	8					7	55	45
Segment Reporting Information, Disposed Drililng Rigs										2
Asset Impairment Charges		$ 1,032,000	$ 0							$ 600,000					$ 400,000
Drilling Rigs Under Term Contract To Be Built													10										10		7	3
Well Service Rigs																								97						87	9	1
Wireline Units																								108
Coiled Tubing Units																								10
Well Service Rigs, Additions in Next Fiscal Period														11
Wireline Units, Additions in Next Fiscal Period														11
Coiled Tubing Units, Additions in Next Fiscal Period														3
Drilling Rigs, Contractual Term																																	6 months	4 years
Property, Plant and Equipment, Gross		1,443,614,000		1,336,926,000
Assigned Drilling Rigs, Number of Contracts Expiring in Six Months																													25
Assigned Drilling Rigs, Number of Contracts Expiring in One Year																													19
Assigned Drilling Rigs, Number of Contracts Expiring in Two Years																													1
Restricted Cash and Investments [Abstract]
Restricted Cash and Cash Equivalents		700,000
Restricted Cash and Cash Equivalents, Current								700,000
Payments for Obligations from Previous Acquisition, Current									700,000
Investments [Abstract]
Auction Market Preferred Securities, Stock Series, Value					15,900,000
Available-for-sale Securities, Gross Realized Gains (Losses), Sale Proceeds	12,600,000
Auction Market Preferred Securities, Sales price as a Percentage of Par Value			79.00%
Derivative Assets, Noncurrent						200,000	600,000
Construction in Progress, Gross		158,300,000
Interest Costs Incurred, Capitalized		$ 2,000,000