Accounts and Financing Receivables (Credit Quality Analysis of Financing Receivable) (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Jun. 30, 2025
Financing Receivable, Credit Quality Indicator [Line Items]
Total financing receivables	$ 37,365		$ 38,509
Gross write-offs Prior	143		1,158
Gross write-offs Four Years Before	60		642
Gross write-offs Three Years Before	611		478
Gross write-offs Two Years Before	131		1,014
Gross write-offs Year Before	23		876
Gross write-offs Origination Year	0		13
Gross write-offs	968	$ 1,098	4,181
1-30 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	704		319
Four Years Before	80		303
Three Years Before	349		116
Two Years Before	216		37
Year Before	104		1,099
Origination Year	195		1,623
Total financing receivables	1,648		3,497
31-60 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	302		67
Four Years Before	96		122
Three Years Before	39		42
Two Years Before	521		68
Year Before	353		377
Origination Year	14		378
Total financing receivables	1,325		1,054
61-90 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	91		21
Four Years Before	13		28
Three Years Before	58		0
Two Years Before	28		255
Year Before	703		27
Origination Year	0		72
Total financing receivables	893		403
91-120 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	44		30
Four Years Before	0		0
Three Years Before	263		0
Two Years Before	3		11
Year Before	659		42
Origination Year	0		17
Total financing receivables	969		100
121-150 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	36		44
Four Years Before	2		10
Three Years Before	21		0
Two Years Before	41		45
Year Before	335		52
Origination Year	0		103
Total financing receivables	435		254
Greater than 150 days past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	3,611		2,261
Four Years Before	938		1,291
Three Years Before	1,426		1,171
Two Years Before	1,920		2,058
Year Before	447		1,935
Origination Year	0		293
Total financing receivables	8,342		9,009
Total past due
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	4,788		2,742
Four Years Before	1,129		1,754
Three Years Before	2,156		1,329
Two Years Before	2,729		2,474
Year Before	2,601		3,532
Origination Year	209		2,486
Total financing receivables	13,612		14,317
Current
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	7,528		5,858
Four Years Before	1,556		2,609
Three Years Before	2,982		1,819
Two Years Before	4,210		3,323
Year Before	5,614		4,440
Origination Year	1,863		6,143
Total financing receivables	23,753		24,192
Financing receivables, gross
Financing Receivable, Credit Quality Indicator [Line Items]
Prior	12,316		8,600
Four Years Before	2,685		4,363
Three Years Before	5,138		3,148
Two Years Before	6,939		5,797
Year Before	8,215		7,972
Origination Year	2,072		8,629
Total financing receivables	$ 37,365		$ 38,509

Adtalem Global Education Inc. 10-Q