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Derivative Instruments and Hedging Activities - Interest Rate Swaps Designated as Hedging Instruments Included in Interest Expense (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Net Interest Expense | $ 19,752 | $ 13,918
Derivatives Designated as Hedging Instruments | Interest rate swaps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Net Interest Expense | $ 0 | $ (27)

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The net amount of operating interest income (expense). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 225 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.10) -URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882 + Details
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- Details
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