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Derivative (Narratives) (Details) - USD ($) |  | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jan. 31, 2018 | Jun. 30, 2019 | Jun. 30, 2019 | Dec. 31, 2018
Derivative Instruments And Hedging Activities Disclosure [Line Items] |  |  |  |
Deferred losses on derivative instruments accumulated in AOCI expected to be reclassified to earnings |  | $ 93,000 | $ 200,000 |
Derivative Interest Rate Swap Effective Percentage |  | 100.00% |  |
Secured Debt |  | $ 54,821,000 | 54,821,000 | $ 60,795,000
Line of Credit Facility, Maximum Borrowing Capacity | $ 25,000,000 |  |  |
Other liabilities-non current [Member] | Derivatives qualifying as hedges [Member] |  |  |  |
Derivative Instruments And Hedging Activities Disclosure [Line Items] |  |  |  |
Notional Amount of Interest Rate Derivatives |  | $ 31,591,000 | $ 31,591,000 | $ 34,090,000
Term Loan [Member] |  |  |  |
Derivative Instruments And Hedging Activities Disclosure [Line Items] |  |  |  |
Notional Amount of Interest Rate Swaps | $ 36,000,000 |  |  |
LIBOR Fixed Rate | 2.72% |  |  |
Secured Debt | $ 64,000,000 |  |  |

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Nominal or face amount used to calculate payments on the derivative asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5580258-113959 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5579245-113959 + Details
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