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Long-Term Debt Fair Value Measurements (Details) | 3 Months Ended
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Mar. 31, 2018
Fair Value, Measurement Inputs, Disclosure [Text Block] | 2.2

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- Definition The entire disclosure of the fair value measurement of assets and liabilities, which includes financial instruments measured at fair value that are classified in shareholders' equity, which may be measured on a recurring or nonrecurring basis. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -URI http://asc.fasb.org/topic&trid=2155941 + Details
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