Income Taxes (Table Level 3)

12 Months Ended

Jun. 30, 2011

Income Taxes

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

	Year ended June 30,
	2011	2010	2009
Current:
Federal	$      43,334	$      39,994	$     39,616
State	6,180	6,238	7,527
Deferred:
Federal	18,276	14,327	7,345
State	2,251	2,367	(280)
	$      70,041	$      62,926	$     54,208

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

	June 30,
	2011	2010
Deferred tax assets:
Deferred revenue	$       5,372	$       3,875
Expense reserves (bad debts, insurance,
franchise tax and vacation)	8,086	6,730
Net operating loss carryforwards	11,097	12,222
Other, net	1,122	514
	25,677	23,341
Deferred tax liabilities:
Accelerated tax depreciation	(29,971)	(17,425)
Accelerated tax amortization	(81,265)	(73,355)
Other, net	(18,713)	(16,307)
	(129,949)	(107,087)
Net deferred tax liability before valuation allowance	(104,272)	(83,746)
Valuation allowance	(306)	(306)
Net deferred tax liability	$ (104,578)	$   (84,052)

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

	Year Ended June 30,
	2011	2010	2009
Computed "expected" tax expense	35.0%	35.0%	35.0%
Increase (reduction) in taxes resulting from:
State income taxes,
net of federal income tax benefits	2.6%	2.5%	2.7%
Research and development credit	-2.0%	-0.7%	-3.0%
Permanent book/tax differences	-2.0%	-0.9%	-0.4%
Section 199 - prior year benefits	-0.2%	-1.8%	0.0%
Deferred tax adjustments	0.5%	0.7%	0.0%
Valuation Allowance	0.0%	0.0%	0.2%
Other (net)	-0.1%	0.0%	0.0%
	33.8%	34.8%	34.5%

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block]

	Unrecognized Tax Benefits
Balance at July 1, 2009	$           5,518
Additions for current year tax positions	691
Reductions for current year tax positions	(39)
Additions for prior year tax positions	2,049
Reductions for prior year tax positions	(298)
Settlements	-
Reductions related to expirations of statute of limitations	(734)
Balance at June 30, 2010	7,187
Additions for current year tax positions	1,338
Reductions for current year tax positions	-
Additions for prior year tax positions	599
Reductions for prior year tax positions	-
Settlements	-
Reductions related to expirations of statute of limitations	(227)
Balance at June 30, 2011	$           8,897