Discontinued Operations - Additional Information (Detail)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 02, 2016
Mar. 31, 2015
USD ($)
Mar. 17, 2015
USD ($)
Dec. 31, 2015
USD ($)
Sep. 30, 2015
USD ($)
Jun. 30, 2015
USD ($)
Mar. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Sep. 30, 2014
USD ($)
Jun. 30, 2014
USD ($)
Mar. 31, 2014
USD ($)
Dec. 31, 2015
USD ($)
Business
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Contract
Dec. 31, 2012
USD ($)
Dec. 31, 2011
USD ($)
Nov. 30, 2015
USD ($)
Jun. 12, 2015
USD ($)
Mar. 31, 2013
USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Number of businesses disposed | Business                       3              
Income (loss) from discontinued operations, net of provision for income taxes       $ 58,183 $ 2,212 $ 517 $ 35,120 $ 6,472 $ (18,664) $ (10,453) $ 17,426 $ 96,032 $ (5,219) $ 20,831          
Aggregate payment to DOJ                       55,500              
Payments for Legal Settlements                         36,500 5,000 $ 14,000        
Nigeria Assets and Nigeria-Based Operations                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Amount claimed subsequently amended                               $ 273,700      
Downstream Professional Services                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest           10,000                          
Discontinued Operations, Disposed of by Sale | Oman                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Income (loss) from discontinued operations, net of provision for income taxes                           23,600          
Discontinued Operations, Disposed of by Sale | Cash | Oman                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest                                     $ 38,900
Discontinued Operations, Disposed of by Sale | Escrow Deposit | Oman                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest                                     $ 2,400
Discontinued Operations, Disposed of by Sale | Professional Services Segment                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest       130,000               130,000         $ 130,000    
Holdback amount                                 $ 7,500    
Gain (loss) on sale of business       $ 97,000               97,000              
Discontinued Operations, Disposed of by Sale | Professional Services Segment | Subsequent Event                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Contingent consideration, working capital adjustment, response period 45 days                                    
Discontinued Operations, Disposed of by Sale | Downstream Professional Services                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest                                   $ 10,000  
Gain (loss) on sale of business                       (2,200)              
Discontinued Operations, Disposed of by Sale | Premier Utility Services, LLC                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest   $ 51,000         51,000                        
Gain (loss) on sale of business             37,100         37,100              
Escrow deposit   $ 4,000         $ 4,000                        
Escrow deposit period   18 months         18 months                        
Discontinued Operations, Disposed of by Sale | UtilX                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest   $ 40,000 $ 40,000       $ 40,000                        
Gain (loss) on sale of business             21,400         $ 20,300              
Escrow deposit   $ 500 $ 500       $ 500                        
Escrow deposit period     6 months       6 months                        
Decrease in escrow account         $ (500)                            
Discontinued Operations, Disposed of by Sale | CTS                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest                   25,000                  
Gain (loss) on sale of business                   (8,200)                  
Non-cash charge                   $ 15,000                  
Discontinued Operations, Disposed of by Sale | Hawkeye                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest                           $ 27,700          
Number of Letters of Credit | Contract                           2          
Income (loss) from discontinued operations, net of provision for income taxes               (2,700)                      
Discontinued Operations, Disposed of by Sale | Hawkeye | Letter of Credit                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Letter of credit                           $ 16,200          
Discontinued Operations, Disposed of by Sale | Hawkeye | Letter of Credit | Escrow Agent                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Escrow deposit                     5,000     $ 8,000          
Discontinued Operations, Disposed of by Sale | Hawkeye | Cash                                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                                      
Consideration for sale of equity interest           $ 3,700   $ 1,500     $ 21,200   $ 1,500