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Derivative Instruments and Hedging Activity (Details) - Interest Rate Swap [Member] $ in Thousands | Jun. 30, 2018 USD ($) Number | Dec. 31, 2017 USD ($) Number
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Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Interest Rate Derivatives, Number of Instruments | Number | 4 | 5
Interest Rate Derivatives, Notional Amount | $ | $ 158,924 | $ 184,304

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- Definition Nominal or face amount used to calculate payments on the derivative liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 + Details
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