Business Combination (Tables)

12 Months Ended

Dec. 31, 2018

Preliminary Purchase Price Allocation for the Sivomatic Acquisition

The following table summarizes the Company’s preliminary purchase price allocation for the Sivomatic acquisition as of December 31, 2018, as compared with the allocation previously reported on the Company's Form 10-Q for the quarter ended July 1, 2018:

	Preliminary Allocation
	Previously Reported on Form		Increase/			Allocation as of
(millions of dollars)	10-Q as of July 1, 2018		(Decrease)			December 31, 2018
Accounts receivable	$	24.4	$	—		$	24.4
Inventories		15.6		—			15.6
Other current assets		0.6		—			0.6
Mineral rights		35.0		4.7			39.7
Plant, property and equipment		38.0		(9.7	)		28.3
Goodwill		32.4		2.6			35.0
Intangible assets		20.0		6.4			26.4
Total assets acquired		166.0		4.0			170.0
Current maturity of long-term debt		5.7		—			5.7
Accounts payable		9.0		—			9.0
Accrued expenses		5.8		(0.2	)		5.6
Long-term debt		5.1		0.2			5.3
Non-current deferred tax liability		16.2		3.5			19.7
Other non-current liabilities		0.1		2.1			2.2
Total liabilities assumed		41.9		5.6			47.5
Net assets acquired	$	124.1	$	(1.6	)	$	122.5