Annual report pursuant to Section 13 and 15(d)

Business Segments - Financial information by segment (Details)

v3.21.2
Business Segments - Financial information by segment (Details)
$ in Thousands
 12 Months Ended
Sep. 30, 2021
USD ($)
state
segment
Sep. 30, 2020
USD ($)
Sep. 30, 2019
USD ($)
Financial information for each of the Company's business segments      
Number of operating segments | segment 3    
Number of states supported in unemployment insurance programs (more than) | state 15    
Revenue:      
Revenue $ 4,254,485 $ 3,461,537 $ 2,886,815
Gross profit:      
Gross profit $ 946,975 $ 711,002 $ 671,184
Gross profit (as a percent) 22.30% 20.50% 23.20%
Selling, general, and administrative expenses:      
Selling, general, and administrative expenses $ 494,088 $ 387,090 $ 321,023
Selling, general, and administrative expense (as a percent) 11.60% 11.20% 11.10%
Gain on sale of a business $ 0 $ (1,718) $ 0
Operating income:      
Operating income $ 408,530 $ 288,278 $ 317,107
Operating income (as a percent) 9.60% 8.30% 11.00%
Amortization of Intangible Assets $ (44,357) $ (35,634) $ (33,054)
Depreciation and amortization $ 46,361 $ 64,527 $ 52,404
Depreciation and amortization (as a percent) 1.10% 1.90% 1.80%
Acquisition related costs $ 9,500    
Segment Reconciling Items      
Selling, general, and administrative expenses:      
Selling, general, and administrative expenses 10,746 $ 4,358 $ 2,676
Gain on sale of a business 0 (1,718) 0
Operating income:      
Amortization of Intangible Assets (44,357) (35,634) (33,054)
Other (10,746) (4,358) (2,676)
Acquisition related costs 9,500    
U.S. Services      
Revenue:      
Revenue 1,662,110 1,329,274 1,176,488
U.S. Services | Operating Segments      
Revenue:      
Revenue 1,662,110 1,329,274 1,176,488
Gross profit:      
Gross profit $ 408,050 $ 360,272 $ 344,109
Gross profit (as a percent) 24.60% 27.10% 29.20%
Selling, general, and administrative expenses:      
Selling, general, and administrative expenses $ 153,609 $ 132,489 $ 123,275
Selling, general, and administrative expense (as a percent) 9.20% 10.00% 10.50%
Operating income:      
Operating income $ 254,441 $ 227,783 $ 220,834
Operating income (as a percent) 15.30% 17.10% 18.80%
Depreciation and amortization $ 20,350 $ 20,951 $ 18,466
Depreciation and amortization (as a percent) 1.20% 1.60% 1.60%
U.S. Federal Services      
Revenue:      
Revenue $ 1,893,284 $ 1,633,337 $ 1,111,197
U.S. Federal Services | Operating Segments      
Revenue:      
Revenue 1,893,284 1,633,337 1,111,197
Gross profit:      
Gross profit $ 432,551 $ 318,925 $ 242,070
Gross profit (as a percent) 22.80% 19.50% 21.80%
Selling, general, and administrative expenses:      
Selling, general, and administrative expenses $ 243,485 $ 186,023 $ 126,128
Selling, general, and administrative expense (as a percent) 12.90% 11.40% 11.40%
Operating income:      
Operating income $ 189,066 $ 132,902 $ 115,942
Operating income (as a percent) 10.00% 8.10% 10.40%
Depreciation and amortization $ 12,986 $ 25,153 $ 16,802
Depreciation and amortization (as a percent) 0.70% 1.50% 1.50%
Outside the U.S.      
Revenue:      
Revenue $ 699,091 $ 498,926 $ 599,130
Outside the U.S. | Operating Segments      
Revenue:      
Revenue 699,091 498,926 599,130
Gross profit:      
Gross profit $ 106,374 $ 31,805 $ 85,005
Gross profit (as a percent) 15.20% 6.40% 14.20%
Selling, general, and administrative expenses:      
Selling, general, and administrative expenses $ 86,248 $ 65,938 $ 68,944
Selling, general, and administrative expense (as a percent) 12.30% 13.20% 11.50%
Operating income:      
Operating income $ 20,126 $ (34,133) $ 16,061
Operating income (as a percent) 2.90% (6.80%) 2.70%
Depreciation and amortization $ 13,025 $ 18,423 $ 17,136
Depreciation and amortization (as a percent) 1.90% 3.70% 2.90%