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Derivative Instruments - Derivative Narrative (Details) (USD $) |  | 12 Months Ended
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Jun. 30, 2012 Interest Rate Swap [Member] Cash Flow Hedging [Member] | Jun. 30, 2012 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] July 2011 Maturity [Member] | Jun. 30, 2012 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] Q1 2011 Maturity [Member] | Dec. 31, 2011 Interest Rate Swap [Member] Not Designated as Hedging Instrument [Member] Interest Expense [Member]
Derivative [Line Items] |  |  |  |
Notional Amount of Cash Flow Hedge Instruments | $ 100,000,000 |  |  |
Derivative, Fixed Interest Rate | 1.80% |  |  |
Notional Amount of Other Derivatives Not Designated as Hedging Instruments |  | 125,000,000 | 75,000,000 |
Derivative Instruments Not Designated as Hedging Instruments, Loss |  |  |  | $ 10,000

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- Definition Fixed interest rate related to the interest rate derivative. + References No definition available. + Details
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- Definition Loss included in earnings for the period from the change in fair value of derivative instruments not designated as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=7476318&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 133 -Paragraph 45 -Subparagraph b(1)(b) -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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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