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Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Jan. 01, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Restricted cash | $ 14,080 | $ 3,126 |
Net cash provided by operating activities | $ (84,034) | (114,075) |
AOCI Attributable to Parent | Accounting Standards Update 2016-01 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Cumulative effect from other comprehensive income to retained earnings |  |  | $ (86,572)
Retained Earnings | Accounting Standards Update 2016-01 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Cumulative effect from other comprehensive income to retained earnings |  |  | $ 86,572
Restatement Adjustment | Accounting Standards Update 2016-18 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Net cash provided by operating activities |  | $ 703 |

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