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Commitments and Contingencies Contractual obligations (Details) - USD ($) $ in Thousands | Mar. 31, 2016 | Jun. 30, 2015
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Contractual Obligations [Line Items] |  |
Capital Leases, Future Minimum Payments, Remainder of Fiscal Year | $ 1,170 |
Operating Leases, Future Minimum Payments, Remainder of Fiscal Year | 1,148 |
Build-To-Suit Leases, Future Minimum Payments, Remainder Of Fiscal Year | 0 |
Purchase Obligation, Future Minimum Payments, Remainder of Fiscal Year | 30,696 |
Capital Leases, Future Minimum Payments Due in Two Years | 1,598 |
Operating Leases, Future Minimum Payments, Due in Two Years | 3,836 |
Build-To-Suit Leases, Future Minimum Payments, Due in Year Two | 2,197 |
Purchase Obligation, Due in Second Year | 34,617 |
Capital Leases, Future Minimum Payments Due in Three Years | 900 |
Operating Leases, Future Minimum Payments, Due in Three Years | 3,088 |
Build-To-Suit Leases, Future Minimum Payments, Due in Year Three | 4,438 |
Purchase Obligation, Due in Third Year | 0 |
Capital Leases, Future Minimum Payments Due in Four Years | 144 |
Operating Leases, Future Minimum Payments, Due in Four Years | 2,346 |
Build-To-Suit Leases, Future Minimum Payments, Due in Year Four | 4,526 |
Purchase Obligation, Due in Fourth Year | 0 |
Capital Leases, Future Minimum Payments Due in Five Years | 51 |
Operating Leases, Future Minimum Payments, Due in Five Years | 1,185 |
Build-To-Suit Leases, Future Minimum Payments, Due in Year Five | 4,617 |
Purchase Obligation, Due in Fifth Year | 0 |
Capital Leases, Future Minimum Payments Due Thereafter | 4 |
Operating Leases, Future Minimum Payments, Due Thereafter | 395 |
Build-To-Suit Leases, Future Minimum Payments, Due Thereafter | 60,202 |
Purchase Obligation, Due after Fifth Year | 0 |
Operating Leases, Future Minimum Payments Due | 11,998 |
Build-To-Suit Leases, Future Minimum Payments | 75,980 |
Purchase Obligation | 65,313 |
Capital Leases, Future Minimum Payments Due | 3,867 |
Capital Leases, Future Minimum Payments, Interest Included in Payments | (749) |
Capital Leases, Future Minimum Payments, Present Value of Net Minimum Payments | 3,118 |
Short-term obligations under capital leases | 1,871 | $ 3,249
Capital Lease Obligations, Noncurrent | 1,247 | $ 2,599
Other Postretirement Benefit Plan [Member] |  |
Contractual Obligations [Line Items] |  |
Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year | 269 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Two | 1,171 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Three | 1,306 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Four | 1,480 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Five | 1,555 |
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 8,950 |
Defined Benefit Plan, Expected Future Benefit Payments, Future Minimum Payments Due | 14,731 |
Pension Plan [Member] |  |
Contractual Obligations [Line Items] |  |
Defined Benefit Plan, Expected Future Benefit Payments, Remainder of Fiscal Year | 1,898 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Two | 7,828 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Three | 8,137 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Four | 8,407 |
Defined Benefit Plan, Expected Future Benefit Payments, Year Five | 8,687 |
Defined Benefit Plan, Expected Future Benefit Payments, Five Fiscal Years Thereafter | 47,033 |
Defined Benefit Plan, Expected Future Benefit Payments, Future Minimum Payments Due | 81,990 |
Revolving Credit Facility [Member] |  |
Contractual Obligations [Line Items] |  |
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year | 307 |
Long-term Debt, Maturities, Repayments of Principal in Year Two | 0 |
Long-term Debt, Maturities, Repayments of Principal in Year Three | 0 |
Long-term Debt, Maturities, Repayments of Principal in Year Four | 0 |
Long-term Debt, Maturities, Repayments of Principal in Year Five | 0 |
Long-term Debt, Maturities, Repayments of Principal after Year Five | 0 |
Long-term Debt | $ 307 |
Capital Lease Obligations [Member] | Minimum [Member] |  |
Contractual Obligations [Line Items] |  |
Imputed interest | 0.82% |
Capital Lease Obligations [Member] | Maximum [Member] |  |
Contractual Obligations [Line Items] |  |
Imputed interest | 10.70% |

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid more than one year (or one operating cycle, if longer) after the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6455314&loc=d3e45023-112735 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of minimum lease payments for capital leases due in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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- Definition Amount of minimum lease payments for capital leases due in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. + References No definition available. + Details
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