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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Schedule of Changes in Cash Flows Related Accounting Standard Adoption | The following table illustrates changes in the Company’s cash flows as reported and as previously reported prior to the adopted the Cash Flow ASUs during the fourth quarter of 2017 (in thousands):
|  | Year Ended
|  | December 31, 2016 |  | December 31, 2015
Net cash provided by (used in): |  | As Reported |  | As Previously Reported |  | As Reported |  | As Previously Reported
Net cash provided by (used in) investing activities |  | $ | (428,973 | ) |  | $ | (410,617 | ) |  | $ | (1,660,365 | ) |  | $ | (1,672,005 | )
Net increase (decrease) in balance(1) |  | (270,126 | ) |  | (251,770 | ) |  | 174,330 |  |  | 162,690 |
Balance - beginning of year(1) |  | 407,116 |  |  | 346,500 |  |  | 232,786 |  |  | 183,810 |
Balance - end of year(1) |  | 136,990 |  |  | 94,730 |  |  | 407,116 |  |  | 346,500 |
Balance - continuing operations, end of year(1) |  | 136,990 |  |  | 94,730 |  |  | 401,058 |  |  | 340,442 |
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(1) | Amounts in the As Reported column include cash and cash equivalents and restricted cash as required upon the adoption of the Cash Flow ASUs. Amounts in the As Previously Reported column reflects only cash and cash equivalents.

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- Definition Tabular disclosure of the comparison between amounts disclosed under previous guidance and new guidance. + References No definition available. + Details
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