Segment Disclosures - Summary of Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Revenue	$ 1,104,925	$ 963,897	$ 948,424
Operating expenses	945,635	825,351	823,496
Gross margin	159,290	138,546	124,928
Corporate general and administrative expenses	56,150	46,066	44,406
Legal settlement, net	30,468	0	0
Operating income (loss)	72,672	92,480	80,522
Other (expense) income:
Interest expense	(3,868)	(4,983)	(5,765)
Gain (loss) on sale of operations, net	5,995	(509)	417
Other income, net	18,241	16,500	17,715
Total other income, net	20,368	11,008	12,367
Income from continuing operations before income tax expense	93,040	103,488	92,889
Financial Services
Segment Reporting Information [Line Items]
Revenue	734,026	629,778	616,567
Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	332,323	297,758	296,228
National Practices
Segment Reporting Information [Line Items]
Revenue	38,576	36,361	35,629
Operating Segments | Financial Services
Segment Reporting Information [Line Items]
Revenue	734,026	629,778	616,567
Operating expenses	608,238	525,209	515,240
Gross margin	125,788	104,569	101,327
Corporate general and administrative expenses	0	0	0
Legal settlement, net	0
Operating income (loss)	125,788	104,569	101,327
Other (expense) income:
Interest expense	0	0	0
Gain (loss) on sale of operations, net	(289)	(612)	578
Other income, net	263	262	(121)
Total other income, net	(26)	(350)	457
Income from continuing operations before income tax expense	125,762	104,219	101,784
Operating Segments | Benefits and Insurance Services
Segment Reporting Information [Line Items]
Revenue	332,323	297,758	296,228
Operating expenses	271,650	248,357	246,245
Gross margin	60,673	49,401	49,983
Corporate general and administrative expenses	0	0	0
Legal settlement, net	0
Operating income (loss)	60,673	49,401	49,983
Other (expense) income:
Interest expense	0	(34)	(57)
Gain (loss) on sale of operations, net	6,284	103	0
Other income, net	827	196	238
Total other income, net	7,111	265	181
Income from continuing operations before income tax expense	67,784	49,666	50,164
Operating Segments | National Practices
Segment Reporting Information [Line Items]
Revenue	38,576	36,361	35,629
Operating expenses	34,494	32,637	32,474
Gross margin	4,082	3,724	3,155
Corporate general and administrative expenses	0	0	0
Legal settlement, net	0
Operating income (loss)	4,082	3,724	3,155
Other (expense) income:
Interest expense	0	0	0
Gain (loss) on sale of operations, net	0	0	0
Other income, net	3	1	1
Total other income, net	3	1	1
Income from continuing operations before income tax expense	4,085	3,725	3,156
Corporate and Other
Segment Reporting Information [Line Items]
Revenue	0	0	0
Operating expenses	31,253	19,148	29,537
Gross margin	(31,253)	(19,148)	(29,537)
Corporate general and administrative expenses	56,150	46,066	44,406
Legal settlement, net	30,468
Operating income (loss)	(117,871)	(65,214)	(73,943)
Other (expense) income:
Interest expense	(3,868)	(4,949)	(5,708)
Gain (loss) on sale of operations, net	0	0	(161)
Other income, net	17,148	16,041	17,597
Total other income, net	13,280	11,092	11,728
Income from continuing operations before income tax expense	$ (104,591)	$ (54,122)	$ (62,215)