Income Taxes Income Taxes (Tables)

12 Months Ended

Jun. 30, 2022

Income Tax Disclosure [Abstract]

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

The provision for income taxes consists of the following:

	Year Ended June 30,
	2022		2021		2020
Current:
Federal	$	59,390	$	55,598	$	46,137
State	18,089		13,897		13,690
Deferred:
Federal	24,391		14,401		21,130
State	7,481		2,360		3,451
	$	109,351	$	86,256	$	84,408

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

The tax effects of temporary differences related to deferred taxes shown on the balance sheets were:

	June 30,
	2022		2021
Deferred tax assets:
Contract and service revenues	$	15,340	$	13,428
Expense reserves and accruals (bad debts, compensation, and payroll tax)	15,382		17,566
Leasing liabilities	12,868		15,182
Net operating loss and tax credit carryforwards	2,107		3,242
Other, net	3,311		2,634
Total gross deferred tax assets	49,008		52,052
Valuation allowance	(200)		(270)
Net deferred tax assets	48,808		51,782
Deferred tax liabilities:
Accelerated tax depreciation	(33,390)		(37,066)
Accelerated tax amortization	(192,187)		(175,804)
Contract and service costs	(104,139)		(85,696)
Leasing right-of-use assets	(11,722)		(13,974)
Total gross deferred liabilities	(341,438)		(312,540)
Net deferred tax liability	$	(292,630)	$	(260,758)

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

The following analysis reconciles the statutory federal income tax rate to the effective income tax rates reflected above:

	Year Ended June 30,
	2022		2021		2020
Computed "expected" tax expense	21.0	%	21.0	%	21.0	%
Increase (reduction) in taxes resulting from:
State income taxes, net of federal income tax benefits	4.3	%	3.2	%	3.6	%
Research and development credit	(2.0)	%	(2.4)	%	(2.4)	%
Other (net)	(0.1)	%	(0.1)	%	(0.1)	%
	23.2	%	21.7	%	22.1	%

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

A reconciliation of the unrecognized tax benefits for the fiscal years ended June 30, 2022, 2021, and 2020 follows:

	Unrecognized Tax Benefits
Balance at July 1, 2019	$	10,495
Additions for current year tax positions	1,451
Additions for prior year tax positions	867
Additions related to business combinations	192
Reductions related to expirations of statute of limitations	(2,893)
Balance at June 30, 2020	10,112
Additions for current year tax positions	1,598
Additions for prior year tax positions	490
Reductions for prior year tax positions	(30)
Reductions related to expirations of statute of limitations	(3,408)
Balance at June 30, 2021	8,762
Additions for current year tax positions	1,863
Additions for prior year tax positions	1,642
Reductions for prior year tax positions	(36)
Reductions related to expirations of statute of limitations	(3,241)
Balance at June 30, 2022	$	8,990