Stockholders' Equity Distribution of REIT Taxable Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Equity [Abstract]
Dividends Preferred and Common Stock	$ 69,196	$ 64,510	$ 37,200
Dividends Treated as Taxable Compensation	(94)	(110)	(98)
Portion Of Dividends Declared in Current Year and Paid in Current Year which was Applied to the Prior Year Distribution Requirements	(731)	(2,182)	(470)
Portion Of Dividends Declared in Subsequent Year and Paid in Subsequent Year which Apply to Current Year Distribution Requirements	34	731	2,182
Dividends Applied to Meet Current Year REIT Distribution Requirements	$ 68,405	$ 62,949	$ 38,814