Supplemental Cash Flow Information (Tables)

3 Months Ended

Mar. 31, 2015

Supplemental Cash Flow Elements [Abstract]

Supplemental Cash Flow Information

	Quarter Ended
	March 31,
	2015		2014
	(In millions of dollars)
Interest paid	$	0.1	$	0.4
Income taxes paid	$	1.0	$	0.7
Non-cash investing and financing activities:
Stock repurchases not yet settled (accrued in accounts payable)	$	1.8	$	—
Unpaid purchases of property and equipment	$	1.3	$	3.4