Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
OPERATING ACTIVITIES
Net (loss) income	$ (4.8)	$ 39.7	$ 55.2
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	35.8	34.2	36.3
Stock-based compensation	6.1	4.1	8.3
Gain on sale of assets	0.0	0.0	(1.9)
Deferred income taxes	6.2	1.4	0.6
Net impact of Tax Cuts and Jobs Act	0.0	0.0	0.3
Changes in operating assets and liabilities:
Accounts receivable	16.7	6.5	(11.9)
Inventories	18.5	(7.2)	(29.4)
Prepaid and other current assets	(8.2)	3.5	(9.7)
Accounts payable and accrued expenses	0.1	(14.1)	15.5
Other	(1.1)	(4.4)	(8.5)
Net cash provided by operating activities	69.3	63.7	54.8
INVESTING ACTIVITIES
Purchases of property, plant and equipment	(26.3)	(40.1)	(45.1)
Proceeds from sale of assets	1.4	0.0	2.8
Business acquisitions, net of cash acquired	0.0	(8.1)	(46.9)
Net cash used by investing activities	(24.9)	(48.2)	(89.2)
FINANCING ACTIVITIES
(Payments on) proceeds from revolving credit facility, net	(29.3)	7.8	40.3
Payments on term loans and other debt	(13.0)	(10.3)	(15.5)
Proceeds from other long-term debt	5.5	1.4	4.0
Proceeds from (payments on) finance lease facilities, net	1.4	(3.4)	(0.9)
Dividends	(3.2)	(7.0)	(6.4)
Purchases of treasury stock	(7.5)	(0.9)	(9.0)
Payments of withholding taxes on stock awards	(1.2)	(2.9)	(3.1)
Net cash (used) provided by financing activities	(47.3)	(15.3)	9.4
Effect of exchange rate changes on cash	1.9	0.1	(2.1)
(Decrease) increase in cash and cash equivalents	(1.0)	0.3	(27.1)
Cash and cash equivalents at beginning of year	56.0	55.7	82.8
Cash and cash equivalents at end of year	55.0	56.0	55.7
Income taxes paid	5.5	12.3	21.0
Interest paid	$ 28.3	$ 31.5	$ 33.0