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Lease and Financing Obligations (Tables) | 12 Months Ended
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Dec. 31, 2017
Lease and Financing Obligations [Abstract] |
Minimum Future Operating Leases and Financing Obligations | Minimum future operating leases and financing obligations at December 31, 2017 are as follows (U.S. dollars in thousands):
Year Ending December 31, |  | Operating Leases |  |  | Financing Obligations |
2018 |  | $ | 41,788 |  |  | $ | 736 |
2019 |  |  | 27,088 |  |  |  | 758 |
2020 |  |  | 14,907 |  |  |  | 781 |
2021 |  |  | 10,036 |  |  |  | 790 |
2022 |  |  | 7,672 |  |  |  | 804 |
Thereafter |  |  | 13,250 |  |  |  | 2,027 |
Total minimum lease payments |  | $ | 114,741 |  |  | $ | 5,896 |

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- Definition Tabular disclosure of the aggregate amount of payments due on known contractual obligations for the five years following the date of the latest balance sheet and the combined aggregate amount of maturities of known contractual obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 303 -Paragraph a -Subparagraph 5 + Details
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