Capital and Financing Transactions - Summary of Aggregate Annual Maturities of Mortgage Notes Payable (Details) $ in Thousands	Dec. 31, 2015 USD ($)
Weighted Average GAAP Interest Rate
2016	3.60%
2017	3.70%
2018	3.90%
2019	4.90%
2020	4.80%
Thereafter	3.90%
Total principal maturities and fair value premium on mortgage debt acquired	4.00%
Total Mortgage Maturities, Balloon Payments, Principal Amortization
2016	$ 175,849
2017	426,356
2018	209,724
2019	146,435
2020	115,156
Thereafter	144,938
Total principal maturities	1,218,458
Fair value premiums on mortgage debt acquired, net	19,878
Total principal maturities and fair value premium on mortgage debt acquired	1,238,336
Balloon Payments
Total Mortgage Maturities, Balloon Payments, Principal Amortization
2016	161,407
2017	412,397
2018	193,500
2019	138,632
2020	110,335
Thereafter	135,141
Total principal maturities	$ 1,151,412
Total principal maturities and fair value premium on mortgage debt acquired
Principal Amortization
Total Mortgage Maturities, Balloon Payments, Principal Amortization
2016	$ 14,442
2017	13,959
2018	16,224
2019	7,803
2020	4,821
Thereafter	9,797
Total principal maturities	$ 67,046
Total principal maturities and fair value premium on mortgage debt acquired