XML 105 R83.htm IDEA: XBRL DOCUMENT v3.21.2
Income Taxes - Reconciliation of Effective Tax Rates (Details)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Income Tax Disclosure [Abstract]      
Federal statutory rate 21.00% 21.00% 21.00%
State income taxes 3.20% 4.00% 3.80%
Kansas HPIP credit (0.50%) (0.90%) (1.50%)
Non-qualified stock option exercises (3.60%) (0.50%) 0.00%
Other 0.90% 0.00% 0.00%
Effective income tax rate 21.00% 23.60% 23.30%