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Organization and Summary of Significant Accounting Policies (Narrative) (Details)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2015
USD ($)
well_service_rigs
drilling_rigs
coiled_tubing_units
wireline_tubing_units
Dec. 31, 2013
USD ($)
Dec. 31, 2015
USD ($)
well_service_rigs
mo
drilling_rigs
coiled_tubing_units
wireline_tubing_units
Dec. 31, 2014
USD ($)
drilling_rigs
Dec. 31, 2013
drilling_rigs
Sep. 30, 2015
USD ($)
drilling_rigs
Jun. 30, 2013
USD ($)
Revenue Recognition              
Deferred Revenue, Current $ 6,222   $ 6,222 $ 3,315      
Costs in Excess of Billings, Current 1,500   1,500        
Recognition of Deferred Revenue   $ 5,300 $ 1,100 4,600      
Average Term to Drill Individual Well, Maximum     60        
Cash and Cash Equivalents              
Cash Equivalents, at Carrying Value 1,300   $ 1,300 2,600      
Maximum Original Maturity Period of Cash and Liquid Investments | mo     3        
Trade Receivables              
Accounts Receivable Age Individually Reviewed For Collectibility     90 days        
Unbilled Accounts Receivable              
Unbilled receivables       38,000   $ 13,624  
Intangible Assets              
Amortization of Intangible Assets   $ 8,500 $ 7,900 8,000      
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months 1,500   1,500        
Finite-Lived Intangible Assets, Amortization Expense, Year Two 200   200        
Finite-Lived Intangible Assets, Amortization Expense, Year Three 200   200        
Finite-Lived Intangible Assets, Amortization Expense, Year Four 0   0        
Finite-Lived Intangible Assets, Amortization Expense, Year Five 0   0        
Intangible assets, net of accumulated amortization 1,944   1,944 24,223      
Goodwill             $ 0
Related Party Transactions              
Related Party Transaction, Amounts of Transaction     200 $ 400      
Deferred Tax Assets, Net, Current $ 6,800   $ 6,800        
Drilling Services Segment [Member]              
Trade Receivables              
Payment Term In Days For Services Invoiced Average     30 days        
Payment Term In Days For Services Invoiced Maximum     90 days        
Daywork Drilling Contract [Member]              
Unbilled Accounts Receivable              
Billing Invoice Interval, Period     15 days        
Whiting Petroleum Company [Member] | Sales Revenue, Net [Member]              
Revenue Recognition              
Concentration Risk, Percentage   13.00% 18.00% 12.00%      
Top Three Revenue Producing Clients [Member] | Sales Revenue, Net [Member]              
Revenue Recognition              
Concentration Risk, Percentage   29.00% 29.00% 28.00%      
Production Services Segment [Member]              
Business - Production Services              
Well Servicing Rigs | well_service_rigs 125   125        
Wireline Units | wireline_tubing_units 125   125        
Coiled Tubing Units | coiled_tubing_units 17   17        
Trade Receivables              
Payment Term In Days For Services Invoiced Average     30 days        
Unbilled Accounts Receivable              
Unbilled receivables $ 1,100   $ 1,100 $ 4,400      
Production Services Segment [Member] | 550 Horsepower [Member]              
Business - Production Services              
Well Servicing Rigs | well_service_rigs 114   114        
Production Services Segment [Member] | 600 Horsepower [Member]              
Business - Production Services              
Well Servicing Rigs | well_service_rigs 11   11        
Drilling Services Segment [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 31   31        
Drilling Rig, 2015 New-Build | drilling_rigs 5   5     5  
Disposed Drilling Rigs | drilling_rigs     32        
Drilling Services Segment [Member] | Turnkey Drilling Contract [Member]              
Unbilled Accounts Receivable              
Unbilled receivables $ 600   $ 600 800      
Drilling Services Segment [Member] | Daywork Drilling Contract [Member]              
Unbilled Accounts Receivable              
Unbilled receivables $ 11,900   $ 11,900 $ 32,800      
Drilling Services Segment [Member] | Assets Held-for-sale [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 4   4        
Drilling Services Segment [Member] | Colombia [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 8   8        
Drilling Services Segment [Member] | Drilling Rigs [Member] | Colombia [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 5   5 5      
Drilling Services Segment [Member] | Mechanical and Lower Horsepower Drilling Rigs [Member]              
Business - Drilling              
Disposed Drilling Rigs | drilling_rigs     28   10    
Drilling Services Segment [Member] | Mechanical and Lower Horsepower Drilling Rigs [Member] | Assets Held-for-sale [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 3   3        
Pad-Capable [Member] | Drilling Services Segment [Member]              
Business - Drilling              
Percentage of Drilling Fleet 94.00%   94.00%        
New-build [Domain] | Drilling Services Segment [Member] | New in Last Five Years [Member]              
Business - Drilling              
Drilling Rigs | drilling_rigs 15   15        
Finite-Lived Intangible Assets [Member] | Fair Value, Inputs, Level 3 [Member] | Income Approach Valuation Technique [Member]              
Intangible Assets              
Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of One Percent Increase of Pricing Assumption $ 2,000            
Sensitivity Analysis of Fair Value, Change in Impairment De to Change in Assumption, Impact of One Percent Increase of Utilization Assumption 1,000            
Sensitivity Analysis of Fair Value, Change in Impairment Due to Change in Assumption, Impact of Five Percent Decrease of Discount Rate Assumption $ 2,000            
Fair Value Inputs, Discount Rate 13.00%