Stockholders' Equity Distribution of REIT Taxable Income (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Equity [Abstract]
Dividends Preferred and Common Stock	$ 64,510	$ 37,200	$ 31,655
Dividends Treated as Taxable Compensation	(110)	(98)	(147)
Portion Of Dividends Declared in Current Year and Paid in Current Year which was Applied to the Prior Year Distribution Requirements	(2,182)	(470)	0
Portion Of Dividends Declared in Subsequent Year and Paid in Subsequent Year which Apply to Current Year Distribution Requirements	0	2,182	470
Dividends Applied to Meet Current Year REIT Distribution Requirements	$ 62,218	$ 38,814	$ 31,978