Stockholders' Equity (Tables)

9 Months Ended

Sep. 30, 2016

Stockholders' Equity Note [Abstract]

Schedule of shares purchased under the respective stock purchase plans

The following table shows shares purchased under the respective stock purchase plans:

	Nine Months Ended September 30,
	2016			2015
	Shares	$		Shares	$
2016 Stock Purchase Plan	33,800	$	2.6	—	$	—
2015 Stock Purchase Plan	93,600	5.2		42,100	2.4
2014 Stock Purchase Plan	—	—		60,900	3.4