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Derivative Instruments - Derivative Narrative (Details) (Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified | Sep. 30, 2012 Not Designated as Hedging Instrument [Member] | Sep. 30, 2013 Senior Secured Term Loan A [Member] Cash Flow Hedging [Member] October 2017 Maturity [Member] | Sep. 30, 2013 Senior Secured Term Loan B [Member] Cash Flow Hedging [Member] October 2019 Maturity [Member]
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Derivative [Line Items] |  |  |
Derivative, Notional Amount | $ 100.0 | $ 175.0 | $ 150.0
Derivative, Fixed Interest Rate | 1.80% | 0.74% | 2.05%

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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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- Details
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