Shareholders' Equity (Tables)

6 Months Ended

Jun. 30, 2012

Equity [Abstract]

Schedule of Common Stock Outstanding Roll Forward [Table Text Block]

The following table presents a summary of the changes in the number of common shares outstanding for the periods indicated:

	Six Months Ended
	June 30,
	2012	2011
Balance at beginning of period	40,382,530	30,342,897
Common stock issued under ATM program	402,494	409,237
Common stock issued under DRIP	6,947	—
Common stock issued via public offering	13,332,748	9,200,000
Common stock issued or redeemed under Stock and Incentive Plans	241,663	391,025
Balance at end of period	54,366,382	40,343,159

Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block]

The following table presents a rollforward of the restricted stock activity for the periods presented:

	Three Months Ended				Six Months Ended
	June 30,				June 30,
	2012		2011		2012		2011
Restricted stock at beginning of period	457,034		320,500		365,506		25,000
Restricted stock granted	20,000		20,000		220,821		323,000
Restricted stock vested	(22,917	)	(10,000	)	(132,210	)	(17,500	)
Restricted stock outstanding at end of period	454,117		330,500		454,117		330,500

Schedule of Additional Paid in Capital [Table Text Block]

The following table presents a rollforward of the Company's changes in additional paid-in capital for the six months ended June 30, 2012:

	Additional Paid-In Capital
Balance as of January 1, 2012	$	634,683
Common stock issuances:
DRIP issuances	66
ATM issuances	3,674
Secondary offering	119,859
Incentive plans	192
Amortization of restricted stock	812
Capitalized expenses	(119		)
Balance as of June 30, 2012	$	759,167

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

Accumulated other comprehensive income as of June 30, 2012 and December 31, 2011 is comprised of the following items:

	June 30, 2012			December 31, 2011
Available for sale investments:
Unrealized gains	$	65,279		$	36,091
Unrealized losses	(7,325		)	(13,902		)
	57,954			22,189
Hedging instruments:
Unrealized losses	(36,449		)	(25,444		)
	(36,449		)	(25,444		)
Accumulated other comprehensive income (loss)	$	21,505		$	(3,255	)