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Summary of Significant Accounting Policies - Accumulated Other Comprehensive Income, Other Expenses, and Change in Accounting Pronouncements (Details) - USD ($) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | May 30, 2017
Other comprehensive loss: |  |  |  |
Stockholders' equity, beginning balance | $ 2,297,438,000 |  |  |
Foreign currency translation adjustments | (160,702,000) | $ 108,584,000 | $ (36,922,000) |
Market value adjustments for securities |  |  | (734,000) |
Fair value adjustments for interest rate swap agreements | (973,000) |  |  |
Total Other comprehensive (loss) income | (161,675,000) | 108,584,000 | (37,656,000) |
Stockholders' equity, ending balance | 1,884,180,000 | 2,297,438,000 |  |
Foreign Currency Translation Adjustments |  |  |  |
Other comprehensive loss: |  |  |  |
Stockholders' equity, beginning balance | (103,989,000) | (212,573,000) | (175,651,000) |
Foreign currency translation adjustments | (160,702,000) | 108,584,000 | (36,922,000) |
Market value adjustments for securities |  |  | 0 |
Fair value adjustments for interest rate swap agreements | 0 |  |  |
Total Other comprehensive (loss) income | (160,702,000) | 108,584,000 | (36,922,000) |
Stockholders' equity, ending balance | (264,691,000) | (103,989,000) | (212,573,000) |
Market Value Adjustments for Securities |  |  |  |
Other comprehensive loss: |  |  |  |
Stockholders' equity, beginning balance | 0 | 0 | 734,000 |
Foreign currency translation adjustments | 0 | 0 | 0 |
Market value adjustments for securities |  |  | (734,000) |
Fair value adjustments for interest rate swap agreements | 0 |  |  |
Total Other comprehensive (loss) income | 0 | 0 | (734,000) |
Stockholders' equity, ending balance | 0 | 0 | 0 |
Fair Value Adjustments for Interest Rate Swap Agreements |  |  |  |
Other comprehensive loss: |  |  |  |
Stockholders' equity, beginning balance | 0 | 0 | 0 |
Foreign currency translation adjustments | 0 | 0 | 0 |
Market value adjustments for securities |  |  | 0 |
Fair value adjustments for interest rate swap agreements | (973,000) |  |  |
Total Other comprehensive (loss) income | (973,000) | 0 | 0 |
Stockholders' equity, ending balance | (973,000) | 0 | 0 |
Accumulated Other Comprehensive Items, Net |  |  |  |
Other comprehensive loss: |  |  |  |
Stockholders' equity, beginning balance | (103,989,000) | (212,573,000) | (174,917,000) |
Stockholders' equity, ending balance | $ (265,664,000) | (103,989,000) | $ (212,573,000) |
Disposal Group, Not Discontinued Operations | Russia and Ukraine Divestment |  |  |  |
Other comprehensive loss: |  |  |  |
Cumulative translation adjustment |  | $ 29,100,000 |  | $ 29,100,000

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