Schedule of Common Dividends Paid (Details) (USD $)	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Stockholders' Equity Note [Abstract]
Dividend per Share/Unit	$ 0.38	[1]	$ 0.28
For the Quarter Ended	Dec. 31, 2014
Record Date	Dec. 31, 2014
Payable Date	Jan. 15, 2015

[1] Amount is rounded to the nearest whole cent for presentation purposes.