Goodwill and Other Intangibles (Projected Amortization Expense and Adjustments) (Details) $ in Thousands	Jun. 30, 2015 USD ($)
Acquired Finite-Lived Intangible Assets [Line Items]
Below-market lease liabilities, amortization income, July 1, 2015 - December 31, 2015	$ 11,322
Below-market lease liabilities, amortization income, 2016	22,537
Below-market lease liabilities, amortization income, 2017	22,395
Below-market lease liabilities, amortization income, 2018	22,068
Below-market lease liabilities, amortization income, 2019	21,325
In-Place Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, July 1, 2015 - December 31, 2015	93,804
Amortization expense, 2016	181,211
Amortization expense, 2017	165,618
Amortization expense, 2018	151,440
Amortization expense, 2019	139,492
Leasing Commissions [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, July 1, 2015 - December 31, 2015	360
Amortization expense, 2016	714
Amortization expense, 2017	701
Amortization expense, 2018	594
Amortization expense, 2019	570
Above-Market Leases [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Amortization expense, July 1, 2015 - December 31, 2015	13,485
Amortization expense, 2016	26,897
Amortization expense, 2017	26,525
Amortization expense, 2018	25,950
Amortization expense, 2019	$ 23,988