Restructuring and Other Charges, net - By Segment (Details) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	$ 3,390	$ 7,860
Total	8,506	8,566
Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	1,929	3,199
Total	1,929	3,199
Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	699	3,654
Total	699	3,654
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	(138)	29
Total	(138)	29
Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	900	978
Total	6,016	1,684
Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	3,195	4,789
Personnel | Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	1,804	2,632
Personnel | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	450	1,182
Personnel | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	0	0
Personnel | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	941	975
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	195	3,071
Facilities | Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	125	567
Facilities | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	249	2,472
Facilities | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	(138)	29
Facilities | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges, net	(41)	3
Other Charges
Restructuring Cost and Reserve [Line Items]
Other Charges	5,116	706
Other Charges | Healthcare
Restructuring Cost and Reserve [Line Items]
Other Charges	0	0
Other Charges | Enterprise
Restructuring Cost and Reserve [Line Items]
Other Charges	0	0
Other Charges | Other
Restructuring Cost and Reserve [Line Items]
Other Charges	0	0
Other Charges | Corporate Segment [Member]
Restructuring Cost and Reserve [Line Items]
Other Charges	$ 5,116	$ 706