Stockholders' Equity of the Company (Details) (USD $)	3 Months Ended					3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014 Common Stock [Member]	Dec. 31, 2013 Common Stock [Member]	Mar. 31, 2014 Issuance of Equity - at the market offering [Member] Common Stock [Member]	Mar. 31, 2014 Issuance of Equity under ATM Program [Member]	Mar. 31, 2014 Issuance of Equity under ATM Program [Member] Common Stock [Member]
Common Stock of the Company [Abstract]
At the Market Stock Offering Program Aggregate Value Of Common Stock						$ 200,000,000
Net proceeds from issuance of common stock	0	23,395,000
Common stock, shares issued			82,218,332	82,153,944		2,183,261
At Market Stock Aggregate Gross Sales Price of Common Stock					105,300,000
At the Market Stock Offering Program Remained Available For Issuance							$ 94,700,000