Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 70.1	$ 78.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	33.1	30.1
Stock-based compensation expense	5.4	5.9
Payments for acquisition-related activity	0.0	(3.1)
Deferred income taxes	8.4	8.6
Changes in operating assets and liabilities	(37.4)	(61.6)
Net cash provided by operating activities	79.6	58.6
Investing activities:
Purchases of properties and equipment	(24.3)	(21.2)
Proceeds from sales of properties and equipment	0.5	0.3
Payments for acquisition-related activity	(6.2)	(49.6)
Proceeds from acquisition-related activity	0.8	0.0
Other, net	0.0	0.2
Net cash used for investing activities	(29.2)	(70.3)
Financing activities:
Increase in revolving lines of credit, net	20.5	37.5
Payments of debt financing fees	0.0	(1.0)
Purchases of treasury stock	(13.7)	(1.0)
Redemptions of common stock to satisfy withholding taxes related to stock-based compensation	(9.0)	(1.9)
Payments for acquisition-related activity	0.0	(10.3)
Cash dividends paid to stockholders	(14.5)	(14.5)
Proceeds from stock-based compensation activity	0.6	1.7
Other, net	0.1	0.0
Net cash (used for) provided by financing activities	(16.0)	10.5
Effects of foreign exchange rate changes on cash and cash equivalents	0.2	(0.3)
Increase (decrease) in cash and cash equivalents	34.6	(1.5)
Cash and cash equivalents at beginning of year	31.6	37.4
Cash and cash equivalents at end of period	$ 66.2	$ 35.9