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Note 12 - Mergers and Acquisitions (Details Textual) - USD ($)
shares in Thousands, $ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Nov. 30, 2017
Sep. 25, 2015
May 18, 2015
Mar. 24, 2015
Mar. 23, 2015
Dec. 31, 2017
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Business Combination, Acquisition Related Costs                 $ 4,606      
Goodwill           $ 147,515     147,515   $ 0  
Business Combination, Contingent Consideration, Liability                   $ 0    
Completion Services [Member]                        
Goodwill           147,515     147,515 0    
Well Support Services [Member]                        
Goodwill               $ 307,677   0   $ 307,677
Credit Agreement [Member] | Bank of America N.A. [Member]                        
Debt Agreement, Maximum Borrowing Capacity       $ 1,660,000                
O-Tex [Member]                        
Business Combination, Consideration Transferred $ 271,900                      
Payments to Acquire Businesses, Gross $ 132,500                      
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares 4,420                      
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned $ 138,200                      
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners 49.00%                      
Business Combination, Consideration Transferred, Non-controlling Interest $ 1,250                      
Business Combination, Acquired Receivable, Fair Value 30,000                      
Business Combination, Acquired Receivables, Gross Contractual Amount 30,100                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 71,500                      
Finite-Lived Intangible Asset, Useful Life 14 years 292 days                      
Business Acquisition, Goodwill, Expected Tax Deductible Amount           4,400     4,400      
Business Acquisition, Intangible Assets (Excluding Goodwill), Expected Tax Deductible Amount           10,700     10,700      
Deferred Tax Liabilities, Other           31,300     31,300      
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual           16,200            
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual           400            
Goodwill $ 147,515                      
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net 271,917                      
O-Tex [Member] | Selling, General and Administrative Expenses [Member]                        
Business Combination, Acquisition Related Costs                 4,400      
O-Tex [Member] | Customer Relationships [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 58,100                      
Finite-Lived Intangible Asset, Useful Life 15 years                      
O-Tex [Member] | Trade Names [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 11,800                      
Finite-Lived Intangible Asset, Useful Life 15 years                      
O-Tex [Member] | Noncompete Agreements [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill $ 1,600                      
Finite-Lived Intangible Asset, Useful Life 5 years                      
Nabors Industries, Ltd. [Member]                        
Business Combination, Consideration Transferred       1,400,000                
Payments to Acquire Businesses, Gross       688,100                
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares         62,500              
Business Acquisition, Equity Interest Issued or Issuable, Value Assigned       714,800                
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners               53.00%       53.00%
Business Combination, Acquired Receivable, Fair Value       274,100                
Business Combination, Acquired Receivables, Gross Contractual Amount       296,200                
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill       28,300             $ 42,000  
Finite-Lived Intangible Asset, Useful Life                     11 years  
Business Acquisition, Goodwill, Expected Tax Deductible Amount                     $ 60,800  
Business Acquisition, Intangible Assets (Excluding Goodwill), Expected Tax Deductible Amount                     22,300  
Deferred Tax Liabilities, Other                     208,900  
Business Combination, Acquisition Related Costs                       $ 42,700
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual               $ 822,200        
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual               $ (211,100)        
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred   $ 43,400                 (43,401) [1]  
Goodwill       444,162             456,846  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net       $ 1,408,335             1,364,934  
Nabors Industries, Ltd. [Member] | Completion Services [Member]                        
Goodwill                     141,400  
Nabors Industries, Ltd. [Member] | Well Support Services [Member]                        
Goodwill                     315,400  
Nabors Industries, Ltd. [Member] | Replacement Restricted Stock and Stock Options [Member]                        
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares       400                
Nabors Industries, Ltd. [Member] | Reimbursed Cash for Operating Assets [Member]                        
Other Payments to Acquire Businesses       $ 5,500                
Nabors Industries, Ltd. [Member] | Customer Relationships [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                     $ 13,000  
Finite-Lived Intangible Asset, Useful Life                     15 years  
Nabors Industries, Ltd. [Member] | Trade Names [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                     $ 8,500  
Finite-Lived Intangible Asset, Useful Life                     10 years  
Nabors Industries, Ltd. [Member] | Noncompete Agreements [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                     $ 900  
Finite-Lived Intangible Asset, Useful Life                     5 years  
Nabors Industries, Ltd. [Member] | Developed Technology Rights [Member]                        
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill                     $ 19,600  
Nabors Industries, Ltd. [Member] | Developed Technology Rights [Member] | Minimum [Member]                        
Finite-Lived Intangible Asset, Useful Life                     5 years  
Nabors Industries, Ltd. [Member] | Developed Technology Rights [Member] | Maximum [Member]                        
Finite-Lived Intangible Asset, Useful Life                     15 years  
ESPCT [Member]                        
Business Combination, Consideration Transferred     $ 34,000             $ 34,000    
Payments to Acquire Businesses, Gross     13,600                  
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill     5,173                  
Goodwill     24,219                  
Business Combination, Consideration Transferred, Liabilities Incurred     6,000                  
Business Combination, Contingent Consideration, Liability     14,400     $ 0     $ 0      
Business Combination, Provisional Information, Adjustment, Working Capital             $ (500)          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net     33,473       $ 33,500          
Business Combination, Contingent Consideration, Future Tiered Maximum Payments     29,500                  
Business Combination, Contingent Consideration, Maximum Total Purchase Price     $ 49,100                  
[1] The measurement period adjustments reflect changes in the estimated fair values of certain assets and liabilities, including income taxes. The measurement period adjustments were recorded to reflect new information obtained about facts and circumstances existing as of the date the Merger was consummated and did not result from intervening events subsequent to that date.