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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2017
Accounting Policies [Abstract] |
Interest Cost Capitalized and Incurred | Interest cost capitalized and incurred in the years ended December 31, 2017, 2016, and 2015 are as follows:
|  | Year Ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Interest incurred |  | $ | 2,656 |  |  | $ | 2,538 |  |  | $ | 1,962 |
Interest capitalized |  |  | 487 |  |  |  | 1,210 |  |  |  | 714 |
Interest expense |  | $ | 2,169 |  |  | $ | 1,328 |  |  | $ | 1,248 |
Schedule Related to Adoption of Accounting Standards (Share-Based Compensation and Restricted Cash and Cash Equivalents) | The following table summarizes the effects related to the adoption of both accounting standards (share-based compensation and restricted cash and cash equivalents) for the years ended December 31, 2016 and 2015: Consolidated Statement of Cash Flows Data:
|  | December 31, 2016 |  |  | December 31, 2015 |
|  | As reported |  |  | As adjusted |  |  | As reported |  |  | As adjusted |
Net cash provided by operating activities |  | $ | 218,286 |  |  | $ | 237,761 |  |  | $ | 173,900 |  |  | $ | 185,080 |
Net cash provided by (used in) financing activities |  | $ | 20,655 |  |  | $ | 10,727 |  |  | $ | (15,221 | ) |  | $ | (18,857 | )
Net increase (decrease) in cash and cash equivalents and restricted cash |  | $ | 22,940 |  |  | $ | 32,487 |  |  | $ | (42,202 | ) |  | $ | (34,658 | )
Cash and cash equivalents and restricted cash, beginning of period |  | $ | 23,036 |  |  | $ | 98,420 |  |  | $ | 65,238 |  |  | $ | 133,078 |
Cash and cash equivalents and restricted cash, end of period |  | $ | 45,976 |  |  | $ | 130,907 |  |  | $ | 23,036 |  |  | $ | 98,420 |

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