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Debt - Schedule of Maturities of Long-term Debt (Details) - Mortgages - USD ($)
$ in Thousands
Mar. 31, 2017
Dec. 31, 2016
Amortization    
2017, amortization $ 6,736  
2018, amortization 2,880  
2019, amortization 2,188  
2020, amortization 2,268  
2021, amortization 2,350  
Thereafter 7,356  
Total amortization 23,778  
Maturities    
2017, maturities 336,009  
2018, maturities 262,210  
2019, maturities 250,000  
2020, maturities 0  
2021, maturities 0  
Thereafter 742,675  
Total maturities 1,590,894  
Total long term debt    
2017 342,745  
2018 265,090  
2019 252,188  
2020 2,268  
2021 2,350  
Thereafter 750,031  
Total $ 1,614,672 $ 1,617,840