Intangible Assets and Liabilities Annual Amortization of Intangible Assets (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Assets
Intangible Assets, net	$ 137,290	$ 99,403
Liabilities
Below Market Lease, Net	31,565	$ 26,010
Assets [Member]
Assets
2015 (six months remaining)	25,005
2016	36,642
2017	19,815
2018	12,585
2019	11,286
Thereafter	31,957
Intangible Assets, net	137,290
Liabilities [Member]
Liabilities
2015 (six months remaining)	5,693
2016	7,595
2017	3,461
2018	2,217
2019	1,885
Thereafter	10,714
Below Market Lease, Net	$ 31,565