Quarterly report pursuant to Section 13 or 15(d)

General - Additional Information (Detail)

v2.4.0.8
General - Additional Information (Detail) (USD $)
 3 Months Ended 6 Months Ended 3 Months Ended 6 Months Ended 11 Months Ended
Jun. 30, 2014
Rigs
country
Jun. 30, 2013
Jun. 30, 2014
Rigs
country
Jun. 30, 2013
Dec. 31, 2013
country
Jun. 30, 2014
Exxon Neftegas Limited [Member]
Jun. 30, 2013
Exxon Neftegas Limited [Member]
Jun. 30, 2014
Exxon Neftegas Limited [Member]
Jun. 30, 2013
Exxon Neftegas Limited [Member]
Jun. 30, 2014
ITS [Member]
Mar. 31, 2014
ITS [Member]
Dec. 31, 2013
ITS [Member]
Apr. 22, 2013
ITS [Member]
Revenue, Major Customer [Line Items]                          
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Indefinite-Lived Intangible Assets                       $ 0 [1] $ 8,500,000 [2]
Number of countries in which Entity has operated since inception 50   50                    
Number of countries in which entity operates         24                
Payments to Acquire Property, Plant, and Equipment 12,250,000   106,188,000 63,537,000                  
Barge drilling rigs 14   14                    
Land rings 23   23                    
Percentage accounted for under the equity method 50.00%   50.00%                    
Weighted average useful life                   3 years 3 years 4 months 24 days    
Reimbursement cost 21,800,000 15,400,000 38,200,000 30,300,000                  
Deposits in domestic bank 42,800,000   42,800,000   104,300,000                
Percentage of revenue from major customer           17.50% 13.90% 17.90% 14.30%        
Deposits, Foreign $ 51,000,000   $ 51,000,000   $ 50,100,000                
[1] (3) Management determined that the fair value of the net assets acquired less noncontrolling interest equaled consideration paid; therefore, no goodwill was recorded. Our provisional allocation included an adjustment of $40.2 million to reduce the historical carrying value of the acquired property, plant and equipment to its estimated fair value at the date of acquisition. The measurement period adjustments to receivables, deferred income taxes, intangibles, and noncontrolling interests directly impacted the determination of the final fair value of the acquired property, plant and equipment, resulting in measurement period adjustments totaling $2.6 million
[2] $10.0 million and $0.2 million to reflect the estimated fair values of definite- and indefinite-lived intangible assets, respectively, for the ITS Acquisition. During the 2013 fourth quarter we recorded adjustments of $1.5 million and $0.2 million to reduce the value of the definite- and indefinite-lived intangible assets down to $8.5 million and zero respectively. Our depreciation and amortization expense for the year ended December 31, 2013 reflects this valuation adjustment. Definite-lived intangible assets recorded in connection with the ITS Acquisition, which primarily relate to trade names, customer relationships, and developed technology are being amortized over a weighted average period of approximately 3.4 years.