Unaudited Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating Activities
Net income	$ 77,933	$ 47,562
Adjustments to reconcile net income to net cash provided by operations:
Depreciation	6,233	4,682
Amortization	18,064	17,702
Gain (Loss) on Extinguishment of Debt	0	250
Deferred income taxes	(7,353)	(1,258)
Non-cash stock compensation and retirement savings plan contributions	17,733	16,008
Amortization of debt discount and issuance costs	1,822	7,684
Adjustment to fair value of contingent consideration for purchase of businesses	(351)	46
Changes in operating assets and liabilities, net of business acquisitions:
Accounts receivable	(12,642)	(30,155)
Other assets	(2,153)	(924)
Accounts payable	(7,288)	(4,830)
Other liabilities	(20,557)	(18,632)
Net cash provided by operating activities	71,441	38,135
Investing Activities
Purchase of property and equipment	(7,019)	(5,892)
Capitalization of internally developed software costs	(678)	(762)
Purchase of businesses, net of cash acquired	(44,716)	(14,872)
Net cash used in investing activities	(52,413)	(21,526)
Financing Activities
Payments for repurchase of convertible notes	0	(13,907)
Proceeds from sale of hedges related to repurchase of convertible notes	0	6,053
Repurchase of warrants related to repurchase of convertible notes	0	(5,042)
Payment for credit facility financing fees	0	(633)
Proceeds from line of credit	10,000	0
Payments on line of credit	(10,000)	0
Payment of contingent consideration for purchase of business	0	(6,470)
Proceeds from the sale of stock through the Employee Stock Purchase Plan	832	363
Purchases of treasury stock	(13,052)	(17,906)
Remittance of taxes withheld as part of a net share settlement of restricted stock vesting	(9,007)	(5,243)
Net cash used in financing activities	(21,227)	(42,785)
Effect of exchange rate on cash and cash equivalents	(1,366)	(623)
Change in cash and cash equivalents	(3,565)	(26,799)
Cash and cash equivalents at beginning of period	24,410	83,204
Cash and cash equivalents at end of period	20,845	56,405
Supplemental Disclosures:
Cash paid for income taxes	25,912	14,713
Cash paid for interest	697	3,137
Stock issued for purchase of businesses	2,556	3,803
Liability incurred for purchase of property and equipment	$ 3,765	$ 0