Equity (Net Income Attributable To Common Stockholders And Transfers (To) From Noncontrolling Interests) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Stockholders' Equity Note [Abstract]
Net income attributable to common stockholders	$ 7,389	$ 10,751	$ 33,728	$ 36,468
Increase in common stockholders paid-in capital for redemption of operating partnership units	9,054	100	29,534	18,616
Change from net income attributable to common stockholders and transfers from noncontrolling interest	$ 16,443	$ 10,851	$ 63,262	$ 55,084