CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended				6 Months Ended		12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Mar. 31, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net earnings	$ 21.7	$ 18.0	$ 13.1	$ 15.3	$ 39.6	$ 28.4
Adjustments to reconcile net earnings to cash provided by operating activities:
Depreciation					13.7	12.7
Amortization expense (including deferred financing fees)					4.9	4.6
Loss on extinguishment of debt	0.0		0.0		0.0	1.4
Inventory obsolescence					0.7	0.8
Unrealized foreign currency loss (gains)					2.0	(1.8)
Stock-based compensation					4.6	4.5
Bad debt and customer claims					0.9	0.7
Changes in assets and liabilities:
Customer receivables					0.4	(11.5)
Inventories					(11.8)	(13.6)
Prepaid and other current assets					(0.8)	0.8
Accounts payable					4.3	7.8
Accrued liabilities					4.4	0.1
Other noncurrent assets and liabilities					(7.0)	(1.2)
Cash provided by operating activities					55.9	33.7
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures					(21.9)	(16.0)
Purchase of business, net of cash acquired					0.0	(304.1)
Cash used in investing activities					(21.9)	(320.1)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from revolving credit facility					198.5	339.0
Repayment of revolving credit facility					(203.5)	(211.0)
Proceeds from term loan					0.0	352.5
Repayment of term loan					(8.6)	(171.8)
Payment of financing fees					0.0	(4.5)
Payment of fees related to debt extinguishment					0.0	(1.0)
Payment of dividends					(16.1)	(15.4)
Purchase of common stock for treasury					(3.0)	(4.4)
Cash (used in) provided by financing activities					(32.7)	283.4
Effect of exchange rate changes on cash and cash equivalents					0.0	2.2
Net increase (decrease) in cash and cash equivalents					1.3	(0.8)
Cash and cash equivalents at beginning of period		$ 1.6		$ 2.2	1.6	2.2	$ 2.2
Cash and cash equivalents at end of period	$ 2.9		$ 1.4		$ 2.9	$ 1.4	$ 1.6