Debt Interest Rate Swaps 2 (Details) $ in Millions	12 Months Ended
Dec. 31, 2015 USD ($)
Forward-starting Interest Rate Swap 1 [Member]
Derivative [Line Items]
Forward-starting interest rate swap agreement, amendment date	Oct. 01, 2015
Forward-starting interest rate swap agreement, effective date	Oct. 19, 2016
Forward-starting interest rate swap agreement, notional amount	$ 75.0
Forward-starting interest rate swap agreement, fixed interest rate	2.273%
Forward-starting interest rate swap agreement, termination date	Nov. 20, 2019
Forward-starting Interest Rate Swap 2 [Member]
Derivative [Line Items]
Forward-starting interest rate swap agreement, amendment date	Oct. 01, 2015
Forward-starting interest rate swap agreement, effective date	Oct. 19, 2016
Forward-starting interest rate swap agreement, notional amount	$ 25.0
Forward-starting interest rate swap agreement, fixed interest rate	2.111%
Forward-starting interest rate swap agreement, termination date	Nov. 20, 2019
Forward-starting Interest Rate Swap 3 [Member]
Derivative [Line Items]
Forward-starting interest rate swap agreement, amendment date	Oct. 01, 2015
Forward-starting interest rate swap agreement, effective date	Oct. 19, 2016
Forward-starting interest rate swap agreement, notional amount	$ 50.0
Forward-starting interest rate swap agreement, fixed interest rate	2.111%
Forward-starting interest rate swap agreement, termination date	Nov. 20, 2019

Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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

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- Definition

Derivative, Forward-starting Effective Date

+ References

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- Definition

Fixed interest rate related to the interest rate derivative.

+ References

No definition available.

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- Definition

Date the entity entered into the derivative contract, in CCYY-MM-DD format.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

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- Definition

Date the derivative contract matures, in CCYY-MM-DD format.

+ References

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