Debt - Schedule of Maturities of Long-term Debt (Details) - Fixed rate mortgage debt - USD ($) $ in Thousands	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
2019 amortization	$ 3,790
2020 amortization	3,938
2021 amortization	4,090
2022 amortization	5,628
2023 amortization	7,876
Thereafter	33,868
Total amortization	59,190
2019 maturities	250,000
2020 maturities	0
2021 maturities	0
2022 maturities	265,000
2023 maturities	0
Thereafter	1,355,422
Total maturities	1,870,422
2019	253,790
2020	3,938
2021	4,090
2022	270,628
2023	7,876
Thereafter	1,389,290
Total	$ 1,929,612	$ 1,701,224