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Derivatives (Interest Rate Contracts) (Details) - Not designated as hedging $ in Millions | Dec. 31, 2018 USD ($)
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Long-term Interest Rate Swap 2014 |
Open interest rate contracts |
Initial Notional Amount (in millions) | $ 23.0
Interest Rate | 1.90%
Long-term Interest Rate Collar 2013 |
Open interest rate contracts |
Initial Notional Amount (in millions) | $ 40.0
Long-term Interest Rate Collar 2013 | Minimum |
Open interest rate contracts |
Interest Rate | 2.90%
Long-term Interest Rate Collar 2013 | Maximum |
Open interest rate contracts |
Interest Rate | 4.80%
Long-term Interest Rate Swap 2018 |
Open interest rate contracts |
Initial Notional Amount (in millions) | $ 40.0
Interest Rate | 2.60%
Long-term Interest Rate Swap 2018 |
Open interest rate contracts |
Initial Notional Amount (in millions) | $ 25.0
Interest Rate | 2.50%

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- Definition Open interest rate contracts. + References No definition available. + Details
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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 Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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