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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract] |
Schedule of future minimum lease payments for capital and operating leases | Future minimum lease payments under non-cancelable capital and operating leases (with initial or remaining lease terms in excess of one year) as of December 31 are as follows:
| Capital |  | Operating |  | Total Future Payments
2019 | $ | 1,494 |  |  | 116,110 |  |  | 117,604 |
2020 | 1,195 |  |  | 93,724 |  |  | 94,919 |
2021 | 766 |  |  | 66,129 |  |  | 66,895 |
2022 | 562 |  |  | 42,247 |  |  | 42,809 |
2023 | 555 |  |  | 22,207 |  |  | 22,762 |
Thereafter | 3,215 |  |  | 26,097 |  |  | 29,312 |
Total payments | 7,787 |  |  | 366,514 |  |  | 374,301 |
Less amount representing interest | 1,123 |  |  |  |  |
Present value of capitalized lease payments | $ | 6,664 |  |  |  |  |

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