Maximus, Inc. Annual report pursuant to Section 13 and 15(d)

Business segments - Revenue from External Customers by Geographic Areas (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Revenues and total long-lived assets
Revenue	$ 620,903	$ 600,447	$ 622,047	$ 607,564	$ 623,091	$ 617,094	$ 606,453	$ 556,722	$ 2,450,961	$ 2,403,360	$ 2,099,821
United States
Revenues and total long-lived assets
Revenue									1,765,661	1,721,261	1,559,769
United Kingdom
Revenues and total long-lived assets
Revenue									346,342	384,649	267,702
Australia
Revenues and total long-lived assets
Revenue									232,434	200,539	178,167
Rest of World
Revenues and total long-lived assets
Revenue									$ 106,524	$ 96,911	$ 94,183