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Common Shares (Tables)

6 Months Ended

Jun. 30, 2012

2010 and 2011 ATM Programs [Member]

Jun. 30, 2013

2012 ATM Program [Member]

Activity Under At-The-Market Share Offering Program

The following table presents activity under our 2011 ATM program for the three and six months ended June 30, 2012 (in thousands, except per share amounts):



	Three Months Ended		Six Months Ended
	June 30, 2012		June 30, 2012
Total net consideration	$	83,836.3	$	128,128.0
Common shares sold	1,267.1		1,971.4
Average price per share	$	67.19	$	66.01

The following table presents activity under our 2012 ATM program for the three and six months ended June 30, 2013 and 2012 (in thousands, except per share amounts):



	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2013		2012		2013		2012
Total net consideration	$	30,816.2	$	84,711.8	$	40,181.7	84,711.8
Common shares sold	419.3		1,305.5		555.1		1,305.5
Average price per share	$	74.74	$	65.93	$	73.73	$	65.93