Revenue and Deferred Costs Revenue Recognition Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Revenue from Contract with Customer [Abstract]
Revenue recognized from beginning deferred balance	$ 77,274	$ 76,528	$ 147,736	$ 152,657
Future revenue related to unsatisfied performance obligations	$ 7,998,267		$ 7,998,267
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2026-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Future revenue related to unsatisfied performance obligations, expected percentage to be recognized for given time frame	23.00%		23.00%
Future revenue related to unsatisfied performance obligations, expected timing	12 months		12 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2027-01-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Future revenue related to unsatisfied performance obligations, expected percentage to be recognized for given time frame	19.00%		19.00%
Future revenue related to unsatisfied performance obligations, expected timing	12 months		12 months

JACK HENRY & ASSOCIATES INC 10-Q