Income Taxes Deferred Tax Liability (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Jun. 30, 2014
Contract and service revenues and costs	$ 68,503	$ 71,383
Expense reserves (bad debts, insurance, franchise tax and vacation)	14,612	14,776
Net operating loss carryforwards	3,682	4,218
Other, net	1,493	1,148
Deferred tax assets	88,290	91,525
Accelerated tax depreciation	(32,331)	(29,247)
Accelerated tax amortization	(142,776)	(125,054)
Contract and service revenues and costs	(69,790)	(64,338)
Deferred tax liabilities	(244,897)	(218,639)
Net deferred tax liability before valuation allowance	(156,607)	(127,114)
Valuation allowance	(650)	(700)
Net deferred tax liability	$ 157,257	$ 127,814