Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2014

Shareholders' Equity [Abstract]

Schedule of Taxability of Common Shares [Table Text Block]

The following unaudited table summarizes the taxability of common share distributions (taxability for 2014 is estimated):

	2014		2013		2012
Ordinary dividend	$	1.2556	$	1.4312	$	1.5036
Capital gain - 20%	—		0.0016		—
IRC Sec 1250 unrecapture gain - 25%	0.3712		0.4672		0.0164
Return of capital	0.2732		—		0.3800
Total	$	1.9000	$	1.9000	$	1.9000

Preferred Unit Distributions [Table Text Block]

The Company paid the following Equity Preferred Unit distributions for the years ended December 31:

	2013	2012
Distributions (in millions)	$1.6	$9.9
Distribution per unit:
Series B	—	$0.45
Series E	$1.21	$3.50
Series F	$1.32	$1.43
Series G	$1.33	$3.35
Series H	—	$0.77