CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Cash Flows from Operating Activities
Net income	$ 38.1	$ 49.5
Adjustments to reconcile net income to net cash provided by operating activities:
Amortization and depreciation	24.5	24.9
Stock-based compensation	11.7	12.1
Other	3.1	1.5
Changes in operating assets and liabilities:
Accounts receivable	15.2	31.0
Prepaid expenses and income taxes	6.0	16.5
Accounts payable	(6.8)	(1.2)
Accrued payroll	(4.0)	(33.8)
Other	(14.5)	(20.0)
Net cash provided by operating activities	73.3	80.5
Cash Flows from Investing Activities
Cash paid for property and equipment	(10.8)	(11.7)
Other	0.0	(0.6)
Net cash used in investing activities	(10.8)	(12.3)
Cash Flows from Financing Activities
Proceeds from long-term debt	0.0	36.0
Principal payments of long-term debt	(1.3)	(67.5)
Proceeds from employee stock purchase plan	9.5	11.1
Repurchase of common stock	(79.7)	(48.8)
Payment of employment taxes related to release of restricted stock awards	(8.5)	(4.2)
Net cash used in financing activities	(80.0)	(73.4)
Effect of exchange rate changes on cash and cash equivalents	0.0	(0.1)
Net Decrease in Cash and Cash Equivalents	(17.5)	(5.3)
Cash and Cash Equivalents at Beginning of Year	175.9	70.3
Cash and Cash Equivalents at End of Period	158.4	65.0
Supplemental Disclosure of Cash Flow Information
Income taxes	1.5	2.0
Interest	9.8	8.6
Operating leases	6.3	6.6
Noncash transactions —
Operating lease right of use assets obtained in exchange for operating lease liabilities	$ 4.1	$ 7.7