Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2017

Equity [Abstract]

Schedule of Repurchase of Shares

A summary of common shares repurchased for the six months ended June 30, 2016 is shown below:

Repurchase Type	Date Trading Plan Initiated	2017 Purchase Period	Number of Shares Repurchased		Average Price of Shares Repurchased		Total Cost (in millions)		Repurchase Authorization Year
10b5-1 Trading Plan	6/14/2017	06/20/2017-06/28/2017		46,500	$	59.54	$	2.8	2016