Intangible Assets and Liabilities (Details 1) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Acquired Intangible Assets Liabilities
Intangible Assets Acquired			$ 41,148
Amortization Of Intangible Assets Liabilities	$ 9,600	$ 9,600	$ 19,000	$ 19,100
Below-market rent
Acquired Intangible Assets Liabilities
Weighted-average useful life, intangible liabilities			20 years 1 month 6 days
Amortizable Intangible Liabilities			$ (658)
In-place lease
Acquired Intangible Assets Liabilities
Weighted average useful life, intangible assets			15 years 1 month 6 days
Amortizable Intangible Assets			$ 40,561
Above-market rent
Acquired Intangible Assets Liabilities
Weighted average useful life, intangible assets			10 years
Amortizable Intangible Assets			$ 587