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Derivative and Nonderivative Hedging Instrument Fair Value Disclosure (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Asset Derivatives [Abstract] |  |
Gross Amounts of Recognized Assets Presented in the Consolidated Balance Sheets | $ 4,532 | $ 2,900
Liability Derivatives [Abstract] |  |
Total liability derivatives | 356 | 289
Not Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Foreign Currency Derivative Instruments Not Designated as Hedging Instruments, Asset at Fair Value | 44 | 41
Not Designated as Hedging Instrument [Member] | Other Current Liabilities [Member] |  |
Liability Derivatives [Abstract] |  |
Foreign exchange forward contracts | 356 | 289
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | 1,303 | 658
Interest Rate Swap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | 2,226 | 1,712
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | 74 | 17
Interest Rate Cap [Member] | Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | 310 | 179
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Current Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | 111 | 25
Interest Rate Cap [Member] | Not Designated as Hedging Instrument [Member] | Other Noncurrent Assets [Member] |  |
Asset Derivatives [Abstract] |  |
Interest Rate Derivative Assets, at Fair Value | $ 464 | $ 268

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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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