Shareholders' Equity (Tables)

6 Months Ended

Jun. 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:

	Six Months Ended June 30,
	2016				2015
	Declared		Paid		Declared		Paid
Common shares	$	1.880	$	1.880	$	1.740	$	1.740
5.417% Series 1 Cumulative Convertible Preferred shares	$	0.677	$	0.677	$	0.677	$	0.677