Net Income per Share - Basic and Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Earnings Per Share [Abstract]
Net income	$ 26,362,000	$ 27,782,000	$ 53,162,000	$ 54,918,000
Add back interest expense on convertible notes, net of tax	573,000	550,000	1,133,000	1,170,000
Net income, diluted	$ 26,935,000	$ 28,332,000	$ 54,295,000	$ 56,088,000
Basic:
Weighted-average shares of common stock outstanding	33,988	33,914	33,951	33,879
Shares used in computing basic net income per share	33,988	33,914	33,951	33,879
Effect of dilutive securities:
Restricted stock subject to vesting	133	266	144	319
Shares issuable for acquisition consideration (in shares)	166	91	182	91
Shares issuable for conversion of convertible senior notes (in shares)	2,430	2,431	2,430	2,431
Shares issuable for exercise of warrants (in shares)	0	83	0	92
Shares used in computing diluted net income per share	36,717	36,785	36,707	36,812
Basic net income per share (in dollars per share)	$ 0.78	$ 0.82	$ 1.57	$ 1.62
Diluted net income per share (in dollars per share)	$ 0.73	$ 0.77	$ 1.48	$ 1.52
Shares authorized to repurchase					$ 375,000,000
Shares issuable for exercise of warrants (in shares)	0	83	0	92