Non-Controlling Interests, Preferred Shares, Common Shares and Common Shares in Treasury (Tables)

12 Months Ended

Dec. 31, 2016

Redeemable Noncontrolling Interest [Line Items]

Preferred Shares Outstanding

The Company’s preferred shares outstanding are as follows (in thousands):

	December 31,
	2016		2015
Class J—6.5% cumulative redeemable preferred shares, without par value, $500 liquidation value;    750,000 shares authorized; 400,000 shares issued and outstanding at December 31, 2016 and 2015	$	200,000	$	200,000
Class K—6.25% cumulative redeemable preferred shares, without par value, $500 liquidation value;    750,000 shares authorized; 300,000 shares issued and outstanding at December 31, 2016 and 2015		150,000		150,000
	$	350,000	$	350,000

Common Shares [Member]

Redeemable Noncontrolling Interest [Line Items]

Common Share Dividends Declared

Common share dividends declared were as follows:

	For the Year Ended December 31,
	2016		2015		2014
Common share dividends declared per share	$	0.76	$	0.69	$	0.62