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Derivative (Tables) | 12 Months Ended
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Dec. 31, 2018
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block] |
|  |  |  |  | December 31, 2018
|  |  |  |  | Notional Amount |  |  | Fair Value (a)
Derivatives designated as hedging instruments under ASC 815 |  | Balance sheet classification |  | (in thousands)
Interest rate swaps |  | Other assets (long term liabilities) | $ | 34,090 |  | $ | (170)
|  |  |  |  | December 31, 2017
|  |  |  |  | Notional Amount |  |  | Fair Value (a)
Derivatives designated as hedging instruments under ASC 815 |  | Balance sheet classification |  | (in thousands)
Interest rate swaps |  | Other assets (long term liabilities) | $ | 11,900 |  | $ | 37
| (a) See Note 17 for the fair value measurements related to these financial instruments.
Schedule of Cash Flow Hedges Included in AOCI [Table Text Block] |
Derivatives in Hedging Relationships | Amount of loss recognized in OCI on derivative (effective portion)
| Year Ended December 31,
| 2018 |  | 2017
Interest rate swaps | $ | (343) |  | $ | (24)
Location of amount reclassified out of Accumulated Other Comprehensive Income [Table Text Block] |
Details about AOCI Components | Amount reclassified from AOCI into income (effective portion) |  |
| Year Ended December 31, |  | Location of amount reclassified from AOCI
| 2018 |  | 2017 |  | into income (effective portion)
Interest rate swaps | $ | 136 |  | $ | 61 |  | Interest expense, net

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- Definition Tabular disclosure of gain (loss) on derivative and nonderivative instruments designated and qualifying as cash flow hedge recorded in accumulated other comprehensive income (AOCI) and reclassified into earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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