Debt - Schedule of Debt Maturities of Company's Revolving Credit Facilities, Term Loan, Mortgages and Notes Payable, Including Balloon Payments (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Scheduled Principal Payments For Borrowings [Line Items]    
Total debt, net $ 2,054,637 $ 1,712,846
Mortgages and Notes Payable    
Scheduled Principal Payments For Borrowings [Line Items]    
2019 990,586  
2020 12,164  
2021 357,737  
2022 55,715  
2023 351,135  
Thereafter 316,965  
Total debt, net 2,084,302  
Mortgages and Notes Payable | Scheduled Principal    
Scheduled Principal Payments For Borrowings [Line Items]    
2019 11,672  
2020 12,164  
2021 12,737  
2022 13,315  
2023 11,609  
Thereafter 16,895  
Total debt, net 78,392  
Mortgages and Notes Payable | Balloon Payment    
Scheduled Principal Payments For Borrowings [Line Items]    
2019 978,914  
2020 0  
2021 345,000  
2022 42,400  
2023 339,526  
Thereafter 300,070  
Total debt, net $ 2,005,910