Income Taxes Deferred Tax Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2014	Jun. 30, 2013
Deferred revenue	$ 71,383	$ 57,867
Expense reserves (bad debts, insurance, franchise tax and vacation)	14,776	12,515
Net operating loss carryforwards	4,218	6,363
Deferred tax assets, Other	1,122	1,383
Deferred tax assets	91,499	78,128
Accelerated tax depreciation	(29,247)	(35,046)
Accelerated tax amortization	(125,054)	(106,147)
Prepaid expenses	(50,955)	(42,385)
Deferred tax liabilities, Other	(13,357)	(9,714)
Deferred tax liabilities	(218,613)	(193,292)
Net deferred tax liability before valuation allowance	(127,114)	(115,164)
Valuation allowance	(700)	(700)
Net deferred tax liability	$ 127,814	$ 115,864