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Revenue Recognition - Disaggregation of Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 761,920 | $ 631,355 | $ 1,496,114 | $ 1,193,905
U.S. Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 264,395 | 187,344 | 505,397 | 349,278
Canada Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 17,442 | 17,121 | 49,329 | 44,929
International Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 377,986 | 380,338 | 746,831 | 718,561
Drilling Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (59,859) | 31,829 | 122,507 | 59,194
Rig Technologies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 81,321 | 61,185 | 145,990 | 105,261
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (39,083) | 46,462 | (73,940) | (83,318)
Operating segment | Lower 48 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 318,380 | 243,230 | 617,842 | 441,433
Operating segment | Offshore Gulf Of Mexico [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 34,874 | 16,462 | 59,164 | 29,853
Operating segment | Alaska |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 14,027 | 12,351 | 30,148 | 25,013
Operating segment | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 29,089 | 20,007 | 66,656 | 51,773
Operating segment | Middle East And Asia [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 256,018 | 226,951 | 502,811 | 427,826
Operating segment | Latin America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 93,393 | 104,534 | 182,917 | 198,494
Operating segment | Europe Africa And CIS [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 55,222 | 54,282 | 110,516 | 102,831
Operating segment | U.S. Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 264,395 | 187,344 | 505,397 | 349,278
Operating segment | U.S. Drilling | Lower 48 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 219,389 | 160,126 | 423,981 | 297,349
Operating segment | U.S. Drilling | Offshore Gulf Of Mexico [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 32,064 | 16,361 | 53,055 | 29,667
Operating segment | U.S. Drilling | Alaska |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 12,942 | 10,857 | 28,361 | 22,262
Operating segment | Canada Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 17,442 | 17,121 | 49,329 | 44,929
Operating segment | Canada Drilling | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 17,442 | 17,121 | 49,329 | 44,929
Operating segment | International Drilling |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 377,986 | 380,338 | 746,831 | 718,561
Operating segment | International Drilling | Middle East And Asia [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 240,508 | 222,294 | 474,367 | 418,552
Operating segment | International Drilling | Latin America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 87,809 | 103,920 | 171,691 | 197,365
Operating segment | International Drilling | Europe Africa And CIS [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 49,669 | 54,124 | 100,773 | 102,644
Operating segment | Drilling Solutions |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 59,859 | 31,829 | 122,507 | 59,194
Operating segment | Drilling Solutions | Lower 48 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 41,418 | 26,509 | 85,687 | 48,829
Operating segment | Drilling Solutions | Offshore Gulf Of Mexico [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 2,810 | 101 | 6,109 | 186
Operating segment | Drilling Solutions | Alaska |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 877 | 1,306 | 1,443 | 2,437
Operating segment | Drilling Solutions | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,425 | 1,322 | 3,716 | 3,305
Operating segment | Drilling Solutions | Middle East And Asia [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 9,007 | 1,819 | 16,735 | 3,121
Operating segment | Drilling Solutions | Latin America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 3,665 | 614 | 7,649 | 1,129
Operating segment | Drilling Solutions | Europe Africa And CIS [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 657 | 158 | 1,168 | 187
Operating segment | Rig Technologies |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 81,321 | 61,185 | 145,990 | 105,261
Operating segment | Rig Technologies | Lower 48 |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 57,573 | 56,595 | 108,174 | 95,255
Operating segment | Rig Technologies | Alaska |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 208 | 188 | 344 | 314
Operating segment | Rig Technologies | Canada |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 10,222 | 1,564 | 13,611 | 3,539
Operating segment | Rig Technologies | Middle East And Asia [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 6,503 | 2,838 | 11,709 | 6,153
Operating segment | Rig Technologies | Latin America [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 1,919 |  | 3,577 |
Operating segment | Rig Technologies | Europe Africa And CIS [Member] |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | 4,896 |  | 8,575 |
Other reconciling items (1) | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (39,083) | (46,462) | (73,940) | (83,318)
Other reconciling items (1) | Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | (39,083) | 46,462 | (73,940) | (83,318)
Other reconciling items (3) |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Revenue | $ 39,083 | $ 46,462 | $ 73,940 | $ 83,318

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