Commitments and Contingencies Contractual obligations (Details) - USD ($) $ in Thousands	Mar. 31, 2016	Jun. 30, 2015
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%