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SEGMENT DISCLOSURES - Schedule of Segment Information (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 420,012 | $ 398,502 | $ 914,309 | $ 853,108
Operating expenses (income) | 366,368 | 343,987 | 742,853 | 684,998
Gross margin | 53,644 | 54,515 | 171,456 | 168,110
Corporate general and administrative expenses | 22,050 | 15,793 | 40,761 | 31,391
Operating income | 31,594 | 38,722 | 130,695 | 136,719
Other income (expense): |  |  |  |
Interest expense | (5,884) | (5,534) | (10,395) | (9,175)
Gain on sale of operations, net | 0 | 0 | 0 | 99
Other income, net | 2,483 | 5,421 | 11,907 | 10,533
Total other (expense) income, net | (3,401) | (113) | 1,512 | 1,457
Income before income tax expense | 28,193 | 38,609 | 132,207 | 138,176
Financial Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 309,233 | 290,930 | 681,863 | 634,016
Benefits and Insurance Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 97,419 | 95,838 | 205,827 | 195,892
National Practices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 13,360 | 11,734 | 26,619 | 23,200
Operating Segments | Financial Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 309,233 | 290,930 | 681,863 | 634,016
Operating expenses (income) | 262,809 | 243,445 | 528,370 | 487,888
Gross margin | 46,424 | 47,485 | 153,493 | 146,128
Corporate general and administrative expenses | 0 | 0 | 0 | 0
Operating income | 46,424 | 47,485 | 153,493 | 146,128
Other income (expense): |  |  |  |
Interest expense | 0 | 0 | 0 | 0
Gain on sale of operations, net |  |  |  | 99
Other income, net | 128 | 235 | 214 | 490
Total other (expense) income, net | 128 | 235 | 214 | 589
Income before income tax expense | 46,552 | 47,720 | 153,707 | 146,717
Operating Segments | Benefits and Insurance Services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 97,419 | 95,838 | 205,827 | 195,892
Operating expenses (income) | 83,243 | 78,374 | 166,880 | 155,297
Gross margin | 14,176 | 17,464 | 38,947 | 40,595
Corporate general and administrative expenses | 0 | 0 | 0 | 0
Operating income | 14,176 | 17,464 | 38,947 | 40,595
Other income (expense): |  |  |  |
Interest expense | 0 | 0 | 0 | (1)
Gain on sale of operations, net |  |  |  | 0
Other income, net | 43 | 153 | 87 | 330
Total other (expense) income, net | 43 | 153 | 87 | 329
Income before income tax expense | 14,219 | 17,617 | 39,034 | 40,924
Operating Segments | National Practices |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 13,360 | 11,734 | 26,619 | 23,200
Operating expenses (income) | 12,028 | 10,545 | 23,961 | 21,128
Gross margin | 1,332 | 1,189 | 2,658 | 2,072
Corporate general and administrative expenses | 0 | 0 | 0 | 0
Operating income | 1,332 | 1,189 | 2,658 | 2,072
Other income (expense): |  |  |  |
Interest expense | 0 | 0 | 0 | 0
Gain on sale of operations, net |  |  |  | 0
Other income, net | (4) | 1 | (4) | 1
Total other (expense) income, net | (4) | 1 | (4) | 1
Income before income tax expense | 1,328 | 1,190 | 2,654 | 2,073
Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Operating expenses (income) | 8,288 | 11,623 | 23,642 | 20,685
Gross margin | (8,288) | (11,623) | (23,642) | (20,685)
Corporate general and administrative expenses | 22,050 | 15,793 | 40,761 | 31,391
Operating income | (30,338) | (27,416) | (64,403) | (52,076)
Other income (expense): |  |  |  |
Interest expense | (5,884) | (5,534) | (10,395) | (9,174)
Gain on sale of operations, net |  |  |  | 0
Other income, net | 2,316 | 5,032 | 11,610 | 9,712
Total other (expense) income, net | (3,568) | (502) | 1,215 | 538
Income before income tax expense | $ (33,906) | $ (27,918) | $ (63,188) | $ (51,538)

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