Intangible Assets and Intangible Liabilities - Schedule of Estimated Annual Amortization of Acquired In-Place Leases (Details) (Leases, Acquired-in-Place [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2015
Leases, Acquired-in-Place [Member]
Finite Lived Intangible Assets [Line Items]
2016	$ 80,797
2017	56,388
2018	49,483
2019	45,147
2020	$ 40,202