Derivative Instruments - Derivative Narrative (Details) (Interest Rate Swap [Member], USD $) In Millions, unless otherwise specified	Mar. 31, 2012 Not Designated as Hedging Instrument [Member]	Mar. 31, 2013 Senior Secured Term Loan A [Member] Cash Flow Hedging [Member] October 2017 Maturity [Member]	Mar. 31, 2013 Senior Secured Term Loan B [Member] Cash Flow Hedging [Member] October 2019 Maturity [Member]
Derivative [Line Items]
Notional Amount of Cash Flow Hedge Instruments		$ 175.0	$ 150.0
Derivative, Fixed Interest Rate	1.80%	0.74%	2.05%
Notional Amount of Other Derivatives Not Designated as Hedging Instruments	$ 100.0

Fixed interest rate related to the interest rate derivative.

No definition available.

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- Details

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- Definition

Aggregate notional amount of all derivatives designated as cash flow hedging instruments. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

+ Details

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- Definition

Aggregate notional amount of all derivatives not designated as a hedging instrument. The notional amount relates to a number of currency units, shares, bushels, pounds, or other units specified in a derivative instrument.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Notional Amount

-URI http://asc.fasb.org/extlink&oid=6519104

+ Details

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