Segment Disclosures - Summary of Segment Information (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Revenue	$ 278,648	$ 236,943	$ 579,378	$ 514,398
Operating expenses	236,934	209,016	460,905	408,843
Gross margin	41,714	27,927	118,473	105,555
Corporate general and administrative expenses	13,816	11,160	28,299	21,649
Legal settlement, net	30,468	0	30,468	0
Operating (loss) income	(2,570)	16,767	59,706	83,906
Other income (expense):
Interest expense	(959)	(2,074)	(1,836)	(3,193)
Gain on sale of operations, net	6,385	57	6,385	152
Other income, net	8,373	13,336	13,162	(2,464)
Total other income (expense), net	13,799	11,319	17,711	(5,505)
Income from continuing operations before income tax    expense	11,229	28,086	77,417	78,401
Financial Services
Segment Reporting Information [Line Items]
Revenue	186,589	154,083	390,738	342,860
Benefits & Insurance
Segment Reporting Information [Line Items]
Revenue	82,620	73,940	169,859	153,552
National Practices
Segment Reporting Information [Line Items]
Revenue	9,439	8,920	18,781	17,986
Operating segments | Financial Services
Segment Reporting Information [Line Items]
Revenue	186,589	154,083	390,738	342,860
Operating expenses	150,920	127,417	292,666	266,015
Gross margin	35,669	26,666	98,072	76,845
Corporate general and administrative expenses	0	0	0	0
Legal settlement, net	0		0
Operating (loss) income	35,669	26,666	98,072	76,845
Other income (expense):
Interest expense	0	0	0	0
Gain on sale of operations, net	0	11	0	51
Other income, net	194	27	292	46
Total other income (expense), net	194	38	292	97
Income from continuing operations before income tax    expense	35,863	26,704	98,364	76,942
Operating segments | Benefits & Insurance
Segment Reporting Information [Line Items]
Revenue	82,620	73,940	169,859	153,552
Operating expenses	67,776	61,283	134,709	126,506
Gross margin	14,844	12,657	35,150	27,046
Corporate general and administrative expenses	0	0	0	0
Legal settlement, net	0		0
Operating (loss) income	14,844	12,657	35,150	27,046
Other income (expense):
Interest expense	0	(9)	0	(20)
Gain on sale of operations, net	6,385	46	6,385	101
Other income, net	698	130	872	226
Total other income (expense), net	7,083	167	7,257	307
Income from continuing operations before income tax    expense	21,927	12,824	42,407	27,353
Operating segments | National Practices
Segment Reporting Information [Line Items]
Revenue	9,439	8,920	18,781	17,986
Operating expenses	8,487	7,990	17,028	16,273
Gross margin	952	930	1,753	1,713
Corporate general and administrative expenses	0	0	0	0
Legal settlement, net	0		0
Operating (loss) income	952	930	1,753	1,713
Other income (expense):
Interest expense	0	0	0	0
Gain on sale of operations, net	0	0	0	0
Other income, net	0	0	0	1
Total other income (expense), net	0	0	0	1
Income from continuing operations before income tax    expense	952	930	1,753	1,714
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0	0
Operating expenses	9,751	12,326	16,502	49
Gross margin	(9,751)	(12,326)	(16,502)	(49)
Corporate general and administrative expenses	13,816	11,160	28,299	21,649
Legal settlement, net	30,468		30,468
Operating (loss) income	(54,035)	(23,486)	(75,269)	(21,698)
Other income (expense):
Interest expense	(959)	(2,065)	(1,836)	(3,173)
Gain on sale of operations, net	0	0	0	0
Other income, net	7,481	13,179	11,998	(2,737)
Total other income (expense), net	6,522	11,114	10,162	(5,910)
Income from continuing operations before income tax    expense	$ (47,513)	$ (12,372)	$ (65,107)	$ (27,608)