Organization and Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2016

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Drilling Long-Lived Assets, by Region

The drilling rigs in our fleet are currently assigned to the following divisions:

Drilling Division	Rig Count
South Texas	6
West Texas	7
North Dakota	6
Appalachia	4
Colombia	8
	31

Schedule of Production Services Long-Lived Assets, by Type [Table Text Block]

As of March 31, 2016, our production services fleets are as follows:

Production Services Fleets
	550 HP	600 HP	Total
Well servicing rigs, by horsepower (HP) rating	114	11	125
	Offshore	Onshore	Total
Wireline units	6	119	125
Coiled tubing units	5	12	17

Schedule of Drilling Contracts [Table Text Block]

Including thesethreecontracts in Colombia,16of ourdrilling rigs are currently under contract,which if not canceled or renewed prior to the end of their terms, will expire as follows:

	Spot Market Contracts	Term Contracts and Term Contract Expiration by Period
		Total Term Contracts	Within 6 Months	6 Months to 1 Year	1 Year to 18 Months	18 Months to 2 Years	2 to 4 Years
Domestic Rigs:
Earning under contract	3	8	2	1	—	2	3
Earning but not working	—	2	2	—	—	—	—
Colombia Rigs (on standby)	—	3	1	—	—	—	2
	3	13	5	1	—	2	5