Equity (Details) (USD $)	1 Months Ended	3 Months Ended
	Jun. 30, 2012	Mar. 31, 2012	Mar. 31, 2011
Equity (Textual) [Abstract]
Aggregate number of common shares to be issued as per Forward sale agreement	18,975,000
Net proceeds per common share of stock issued	$ 12.432
Dividend declared per common share		$ 0.12	$ 0.04