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Summary of Significant Accounting Policies - Goodwill (Details) $ in Thousands | 9 Months Ended
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Sep. 30, 2019 USD ($)
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
Goodwill - Beginning Balance | $ 183,914
Disposals and Impairments | (93,634)
Cumulative Translation Adjustment | 263
Goodwill - Ending Balance | 90,543
U.S. Drilling |
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
Goodwill - Beginning Balance | 50,149
Other Adjustment | 2,054
Goodwill - Ending Balance | 52,203
International Drilling |
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
Goodwill - Beginning Balance | 75,634
Disposals and Impairments | (75,634)
Drilling Solutions |
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
Goodwill - Beginning Balance | 11,436
Goodwill - Ending Balance | 11,436
Rig Technologies |
Change in the carrying amount of goodwill for various contract drilling segments and other operating segments |
Goodwill - Beginning Balance | 46,695
Disposals and Impairments | (18,000)
Cumulative Translation Adjustment | 263
Other Adjustment | (2,054)
Goodwill - Ending Balance | $ 26,904

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