Capital Stock (Tables)

12 Months Ended

Dec. 31, 2016

Equity [Abstract]

Schedule of Common Stock Shares Purchased and Retired

Shown below is a summary of shares purchased and retired by the Company during the three years ended December 31: 

	Shares of Common Stock
	Purchased	Retired
2016	563,590	610,626
2015	718,269	666,861
2014	752,983	780,077