Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Net service revenues	$ 270,721	$ 240,495	$ 782,300	$ 704,070
Cost of service revenues	183,991	165,310	534,837	483,100
Gross profit	86,730	75,185	247,463	220,970
General and administrative expenses	60,271	54,228	174,028	162,476
Depreciation and amortization	3,620	3,441	10,449	10,571
Total operating expenses	63,891	57,669	184,477	173,047
Operating income	22,839	17,516	62,986	47,923
Interest income	(580)	(83)	(977)	(249)
Interest expense	3,199	2,472	7,991	6,278
Total interest expense, net	2,619	2,389	7,014	6,029
Income before income taxes	20,220	15,127	55,972	41,894
Income tax expense	4,809	3,584	13,034	10,631
Net income	$ 15,411	$ 11,543	$ 42,938	$ 31,263
Net income per common share
Basic income per share	$ 0.96	$ 0.73	$ 2.69	$ 1.97
Diluted income per share	$ 0.95	$ 0.71	$ 2.63	$ 1.94
Weighted average number of common shares and potential common shares outstanding:
Basic	16,012	15,872	15,988	15,846
Diluted	16,286	16,184	16,307	16,146

The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

Name:	us-gaap_CostOfGoodsAndServicesSold
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 45
-Paragraph 28
-Subparagraph (b)
-SubTopic 10
-Topic 230
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482740/230-10-45-28

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482099/360-10-50-1