Stockholders' Equity (Tables)

3 Months Ended

Mar. 31, 2017

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:

	Three Months Ended March 31,
	2017			2016
	Shares	$		Shares	$
2016 Stock Purchase Plan	85,354	$	6.8	—	$	—
2015 Stock Purchase Plan	—	—		93,600	5.2