Convertible Preferred Stock (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		1 Months Ended				0 Months Ended				0 Months Ended		3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	May 31, 2012 Series A Preferred Stock [Member]		Jun. 30, 2013 Series A Preferred Stock [Member]		Jul. 24, 2012 Series B Preferred Stock [Member]		Jun. 30, 2013 Series B Preferred Stock [Member]		Jul. 24, 2012 Series C Preferred Stock [Member]		Jun. 30, 2013 Series C Preferred Stock [Member]
Class of Stock [Line Items]
Convertible preferred stock, outstanding	828,472	828,472			545,454	[1]			283,018	[2]			28,398,213	[3]
Proceeds from Issuance of stock			$ 6,000	[1]			$ 3,000	[2]					$ 445,000	[3]
Liquidation Preferences					$ 11.00	[1]			$ 10.60	[2]			$ 15.67	[3]
Annualized rate of dividend (per share)			$ 0.77	[1]			$ 0.74	[2]
Redemption price per share			$ 11.00
Fair Value Inputs, Discount Rate	2.00%
Value of liquidation preference													$ 15.67
Premium on par value of stock	120.00%
Preferred Stock, Dividend Rate, Percentage											5.81%	[3]

[1] The Series A Convertible Preferred Stock may be redeemed at the option of the Company in whole or in part after the issuance date at $11.00 per share.

[2] The Series B Convertible Preferred Stock may be redeemed at the option of the Company in whole or in part after the issuance date at $10.60 per share.

[3] The Series C Convertible Preferred Stock is mandatorily redeemable or exchangeable for shares of common stock at the option of the Company within three business days following the earliest to occur of (A) the closing of the CapLease Merger (B) the first trading day following (a) an announcement that CapLease has accepted a competing offer (which did not occur within the time specified in the CapLease Merger Agreement) or (b) the CapLease Merger Agreement is otherwise terminated, and (C) December 31, 2013, the Company will have the option to: (I) convert all shares of Series C Convertible Preferred Stock into such number of shares of the Company’s common stock equal to the par value of the Series C Convertible Preferred Stock divided by the lowest of (i) a 2% discount to the VWAP of the Company’s common stock for the 10 prior trading days, (ii) a 2% discount to the closing price on such date and (iii) $15.67, as adjusted from time to time or (II) redeem all shares of the Company’s Series C Convertible Preferred Stock in cash at 120% of its par value. As of June 30, 2013, the Company is limited, without the approval of holders of the Company's common stock and Series C Convertible Preferred Stock to amend the Series C Articles Supplementary, to issuing no more than 3.3 million shares of common stock upon conversion of shares of Series C Convertible Preferred Stock due to limitations imposed by the articles supplementary for the Series C Convertible Preferred Stock. Therefore, upon the required conversion the Company will cancel any remaining Series C Convertible Preferred Stock in exchange for cash in lieu of common stock in an amount equal to the greater of the product of such number of excess shares into which the shares of Series C stock would have been convertible and (i) 120% of the liquidation preference, which is $15.67, as may be adjusted from time to time, and (ii) the Conversion Price valued at the one-day VWAP of the common stock on the applicable date.