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Fair Value Measurements (Tables)
9 Months Ended
Sep. 30, 2019
Fair Value Disclosures [Abstract]  
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis [Table Text Block]
  Fair Value as of September 30, 2019
(In thousands)Level 1Level 2Level 3Total
Assets (Liabilities):
Interest rate swap agreements$-$(669)$-$(669)
  Fair Value as of December 31, 2018
(In thousands)Level 1Level 2Level 3Total
Assets (Liabilities):
Interest rate swap agreements$-$(170)$-$(170)