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Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017 | Nov. 10, 2016 | Nov. 04, 2015
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$400 Million Credit Facility | Secured Debt |  |  |  |
Maximum borrowing capacity | $ 400,000 | $ 400,000 | $ 400,000 |
$98 Million Credit Facility | Line of Credit Facility |  |  |  |
Maximum borrowing capacity | $ 98,000 | $ 98,000 |  | $ 98,000

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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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