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

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Weighted average interest rate of debt outstanding.

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Net amount of long-term deferred finance costs capitalized at the end of the reporting period.

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

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Fixed interest rate related to the interest rate derivative.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Credit Arrangements 2014 Credit Agreement (Details) - USD ($) $ in Thousands	1 Months Ended	9 Months Ended
	Sep. 30, 2011	Mar. 31, 2015	Jun. 30, 2015	Oct. 15, 2014	Jun. 30, 2014	May. 31, 2013	Mar. 22, 2013	Jun. 30, 2011
Debt Instrument [Line Items]
Long-term Debt			$ 357,079
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		0.30%
Derivative, Fixed Interest Rate						0.73%
Notional Amount			468,480		$ 568,853
2014 Credit Agreement [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity				$ 500,000
2014 Credit Agreement [Member] \| LIBOR Plus Margin [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.75%
2014 Credit Agreement [Member] \| Federal Funds Plus Margin [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.50%
2014 Credit Agreement [Member] \| One Month LIBOR Plus Rate [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		1.00%
2014 Credit Agreement [Member] \| One Month LIBOR Plus Margin [Member]
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate		0.75%
2013 Credit Agreement [Member]
Debt Instrument [Line Items]
Deferred Finance Costs, Noncurrent, Net			2,500
Debt, Weighted Average Interest Rate		0.00%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity			$ 250,000
Line of Credit Facility, Current Borrowing Capacity							$ 300,000	$ 300,000
Debt, Weighted Average Interest Rate			3.05%
Revolving Credit Facility [Member] \| 2014 Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Line of Credit			$ 50,000
Line of Credit Facility, Current Borrowing Capacity				300,000
Letters of Credit, maximum issuance amount				10,000
Swingline Loan [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity							75,000
Swingline Loan [Member] \| 2014 Credit Agreement [Member]
Debt Instrument [Line Items]
Line of Credit Facility, Current Borrowing Capacity				100,000
Debt Instrument, Basis Spread on Variable Rate		0.75%
Term Loan [Member]
Debt Instrument [Line Items]
Long-term Debt							$ 200,000	$ 100,000
Term Loan [Member] \| 2014 Credit Agreement [Member]
Debt Instrument [Line Items]
Long-term Debt				$ 200,000
Term Loan [Member] \| 2014 Credit Agreement [Member] \| Debt Instrument, Redemption, Period One [Member]
Debt Instrument [Line Items]
Term Loan, Quarterly Principal Payment Percentage				1.25%
Term Loan [Member] \| 2014 Credit Agreement [Member] \| Debt Instrument, Redemption, Period Two [Member]
Debt Instrument [Line Items]
Term Loan, Quarterly Principal Payment Percentage				2.50%
Term Loan [Member] \| 2014 Credit Agreement [Member] \| Debt Instrument, Redemption, Period Three [Member]
Debt Instrument [Line Items]
Term Loan, Quarterly Principal Payment Percentage				5.00%
Term Loan [Member] \| 2014 Credit Agreement [Member] \| Debt Instrument, Redemption, Period Four [Member]
Debt Instrument [Line Items]
Term Loan, Quarterly Principal Payment Percentage				60.00%
Interest Rate Swap [Member]
Debt Instrument [Line Items]
Amount Of Debt Hedged By Interest Rate Derivatives	$ 100,000	$ 100,000
Derivative, Fixed Interest Rate	1.30%
Designated as Hedging Instrument [Member]
Debt Instrument [Line Items]
Notional Amount			340,699		$ 418,141
Designated as Hedging Instrument [Member] \| Interest Rate Contract [Member]
Debt Instrument [Line Items]
Notional Amount			$ 125,000