Business Combination (Tables)

6 Months Ended

Jun. 30, 2019

Business Combination [Abstract]

Preliminary Purchase Price Allocation for the Sivomatic Acquisition

The following table summarizes the Company’s final amounts recognized for assets acquired and liabilities assumed for the Sivomatic acquisition as compared with the allocation previously reported on the Company's Form 10-K for the year ended December 31, 2018:

(millions of dollars)	Preliminary Allocation Previously Reported on Form 10-K as of December 31, 2018		Increase/ (Decrease)		Final Allocation
Accounts receivable	$	24.4	$	—	$	24.4
Inventories		15.6		—		15.6
Other current assets		0.6		—		0.6
Mineral rights		39.7		—		39.7
Property, plant and equipment		28.3		—		28.3
Goodwill		35.0		—		35.0
Intangible assets		26.4		—		26.4
Total assets acquired		170.0		—		170.0
Current maturity of long-term debt		5.7		—		5.7
Accounts payable		9.0		—		9.0
Accrued expenses		5.6		—		5.6
Long-term debt		5.3		—		5.3
Non-current deferred tax liability		19.7		—		19.7
Other non-current liabilities		2.2		—		2.2
Total liabilities assumed		47.5		—		47.5
Net assets acquired	$	122.5	$	—	$	122.5