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Credit Facilities (Tables) | 12 Months Ended
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Dec. 31, 2017
Line of Credit Facility [Abstract] |
Schedule of Maturities of Long-term Debt | t December 31, 2017, the aggregate future maturities of long-term debt by year are as follows (in thousands):
2018 | $ | — |
2019 | 75,000 |
2020 | — |
2021 | — |
2022 | — |
Total | $ | 75,000 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + 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 + Details
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