Condensed Consolidated Statements of Income - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Income Statement [Abstract]
Net service revenues	$ 216,662	$ 193,987	$ 639,857	$ 568,779
Cost of service revenues	149,616	137,686	442,804	401,646
Gross profit	67,046	56,301	197,053	167,133
General and administrative expenses	46,280	40,733	139,881	125,470
Depreciation and amortization	3,406	3,045	10,594	8,872
Total operating expenses	49,686	43,778	150,475	134,342
Operating income	17,360	12,523	46,578	32,791
Interest income	(37)	(87)	(90)	(576)
Interest expense	1,614	680	4,092	2,309
Total interest expense, net	1,577	593	4,002	1,733
Income before income taxes	15,783	11,930	42,576	31,058
Income tax expense	4,206	2,811	10,508	6,374
Net income	$ 11,577	$ 9,119	$ 32,068	$ 24,684
Net income per common share
Basic income per share	$ 0.74	$ 0.58	$ 2.04	$ 1.59
Diluted income per share	$ 0.72	$ 0.57	$ 2.00	$ 1.55
Weighted average number of common shares and potential common shares outstanding:
Basic	15,748	15,618	15,727	15,573
Diluted	16,030	15,957	16,060	15,934

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.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 924
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SAB Topic 11.L)
-URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.2(a),(d))
-URI http://asc.fasb.org/extlink&oid=123367319&loc=SL114868664-224227