Intangibles (Details 3) - Jun. 30, 2015 - USD ($) $ in Thousands	Total
Future aggregate net amortization of acquired lease intangibles (Net decrease in Revenue)
2015	$ (1,143)
2016	(2,254)
2017	(1,896)
2018	(1,650)
2019	(1,516)
Thereafter	(7,307)
Total	$ (15,766)
Weighted average amortization period for lease intangible liability	14 years
Future aggregate net amortization of acquired lease intangibles (Net Increase in Expenses)
2015	$ 7,466
2016	14,920
2017	13,941
2018	12,494
2019	9,405
Thereafter	35,461
Total	$ 93,687
Weighted average amortization period for lease intangibles	9 years