CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
OPERATING ACTIVITIES
Net income	$ 16.2	$ 17.6
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	9.4	7.8
Stock-based compensation	1.8	2.5
Deferred income tax provision	2.3	3.3
SERP settlement charge	(0.8)	0.0
Non-cash effects of changes in liabilities for uncertain income tax positions	0.1	0.0
Increase in working capital	(18.9)	(11.3)
Pension and other postretirement benefits	(3.5)	1.9
Other	(0.1)	0.2
NET CASH PROVIDED BY OPERATING ACTIVITIES	8.1	22.0
INVESTING ACTIVITIES
Capital expenditures	(7.6)	(11.5)
Other	(0.3)	(0.2)
NET CASH USED IN INVESTING ACTIVITIES	(7.9)	(11.7)
FINANCING ACTIVITIES
Long-term borrowings (Note 7)	104.2	81.8
Repayments of long-term debt (Note 7)	(90.5)	(76.9)
Cash dividends paid	(7.0)	(6.3)
Shares purchased (Note 10)	(5.3)	(6.8)
Proceeds from exercise of stock options	0.1	0.3
NET CASH PROVIDED BY (USED IN) FINANCING ACTIVITIES	1.5	(7.9)
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS	0.2	0.0
NET INCREASE IN CASH AND CASH EQUIVALENTS	1.9	2.4
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	4.5	3.1
CASH AND CASH EQUIVALENTS, END OF PERIOD	6.4	5.5
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Cash paid during period for interest, net of interest expense capitalized	0.8	0.6
Cash paid during period for income taxes	2.4	1.7
Non-cash investing activities:
Liability for equipment acquired	$ 3.0	$ 3.5