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Supplemental Cash Flow Information	9 Months Ended
Supplemental Cash Flow Information	Sep. 30, 2016
Supplemental Cash Flow Elements [Abstract]
Supplemental Cash Flow Information	Supplemental Cash Flow Information. Cash paid, net of refunds, during the nine months ended September 30, 2016 and 2015 for income taxes was $33.4 million and $52.5 million, respectively. Cash paid during the nine months ended September 30, 2016 and 2015 for interest was $19.3 million and $13.7 million, respectively.