Debt - Schedule of Maturities of Long-term Debt (Details) - Mortgages - USD ($) $ in Thousands	Jun. 30, 2016	Dec. 31, 2015
Amortization
2016, amortization	$ 6,089
2017, amortization	9,904
2018, amortization	2,880
2019, amortization	2,188
2020, amortization	2,268
Thereafter, amortization	9,706
Total, amortization	33,035
Maturities
2016, maturities	0
2017, maturities	336,009
2018, maturities	262,210
2019, maturities	290,000
2020, maturities	0
Thereafter, maturities	742,675
Total, maturities	1,630,894
Total long term debt
2016	6,089
2017	345,913
2018	265,090
2019	292,188
2020	2,268
Thereafter	752,381
Total	$ 1,663,929	$ 1,640,145