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Business Segment Information - Summarized Financial Information of Segments (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Segment Reporting Information [Line Items]                      
Total revenues $ 404,469 $ 304,748 $ 254,091 $ 285,116 $ 217,991 $ 177,311 $ 179,080 $ 130,283 $ 1,248,424 $ 704,665 $ 789,735
Operating income 86,103 $ 32,394 $ 5,379 $ 20,092 (1,702) $ (25,702) $ (28,214) $ (75,215) 143,968 (130,833) (114,164)
Other income (expense)                 (219,826) (240,721) 57,793
Income (loss) before income taxes including non-controlling interests                 (75,858) (371,554) (56,371)
Total assets 6,615,130       6,178,632       6,615,130 6,178,632 5,649,375
Property, plant and equipment, net 6,173,486       5,919,567       6,173,486 5,919,567 5,218,242
Capital expenditures                 836,204 1,181,527 609,999
Depreciation, depletion and amortization                 530,802 476,331 485,322
Impairment                 6,887 4,684 46,109
Exploration and Production                      
Segment Reporting Information [Line Items]                      
Total revenues                 1,122,881 635,505 721,672
Midstream Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 185,799 120,853 104,695
Well Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 148,136 93,349 221,478
Operating segments | Exploration and Production                      
Segment Reporting Information [Line Items]                      
Total revenues                 1,122,881 635,505 721,672
Operating income                 40,694 (196,179) (177,512)
Other income (expense)                 (219,823) (240,290) 58,542
Income (loss) before income taxes including non-controlling interests                 (179,129) (436,469) (118,970)
Total assets 6,050,255       5,868,747       6,050,255 5,868,747 5,478,439
Property, plant and equipment, net 5,663,323       5,620,558       5,663,323 5,620,558 5,057,311
Capital expenditures                 602,734 1,017,411 537,806
Depreciation, depletion and amortization                 519,853 467,894 479,693
Impairment                 6,887 2,253 46,109
Operating segments | Midstream Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 72,752 35,406 23,769
Operating income                 102,377 68,868 60,668
Other income (expense)                 (37) (474) (801)
Income (loss) before income taxes including non-controlling interests                 102,340 68,394 59,867
Total assets 663,614       431,095       663,614 431,095 409,635
Property, plant and equipment, net 649,923       424,197       649,923 424,197 264,956
Capital expenditures                 235,090 170,386 96,947
Depreciation, depletion and amortization                 15,999 8,525 5,764
Impairment                 0 2,431 0
Operating segments | Well Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 52,791 33,754 44,294
Operating income                 15,057 3,428 49,145
Other income (expense)                 34 43 52
Income (loss) before income taxes including non-controlling interests                 15,091 3,471 49,197
Total assets 52,800       51,167       52,800 51,167 470,614
Property, plant and equipment, net 46,779       47,189       46,779 47,189 61,402
Capital expenditures                 12,537 680 21,711
Depreciation, depletion and amortization                 12,939 14,892 19,073
Impairment                 0 0 0
Inter-segment | Exploration and Production                      
Segment Reporting Information [Line Items]                      
Total revenues                 0 0 0
Inter-segment | Midstream Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 113,047 85,447 80,926
Inter-segment | Well Services                      
Segment Reporting Information [Line Items]                      
Total revenues                 95,345 59,595 177,184
Eliminations                      
Segment Reporting Information [Line Items]                      
Total revenues                 (208,392) (145,042) (258,110)
Operating income                 (14,160) (6,950) (46,465)
Other income (expense)                 0 0 0
Income (loss) before income taxes including non-controlling interests                 (14,160) (6,950) (46,465)
Total assets (151,539)       (172,377)       (151,539) (172,377) (709,313)
Property, plant and equipment, net $ (186,539)       $ (172,377)       (186,539) (172,377) (165,427)
Capital expenditures                 (14,157) (6,950) (46,465)
Depreciation, depletion and amortization                 (17,989) (14,980) (19,208)
Impairment                 $ 0 $ 0 $ 0