Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2016

Stockholders' Equity Note [Abstract]

Summary of dividends declared and paid per share

The following table provides a summary of dividends declared and paid per share:

	Nine Months Ended September 30,
	2016				2015
	Declared		Paid		Declared		Paid
Common shares	$	2.860	$	2.820	$	2.680	$	2.610
5.417% Series 1 Cumulative Convertible Preferred shares	$	1.016	$	1.016	$	1.016	$	1.016