Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2013

Stockholders' Equity Note [Abstract]

Schedule of Dividends Declared and Paid Per Share [Table Text Block]

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

	Three Months Ended March 31,
	2013				2012
	Declared		Paid		Declared		Paid
Common shares	$	0.730	$	0.730	$	0.690	$	0.690
5.417% Series 1 Cumulative Convertible Preferred shares	$	0.339	$	0.339	$	0.339	$	0.339