XML 63 R47.htm IDEA: XBRL DOCUMENT v3.19.1
Notes Payable and Unsecured Credit Facilities Schedule of maturities of long-term debt (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Debt Instrument [Line Items]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year $ 20,500  
Long-term Debt, Maturities, Repayments of Principal in Year Two 350,361  
Long-term Debt, Maturities, Repayments of Principal in Year Three 87,850  
Long-term Debt, Maturities, Repayments of Principal in Year Four 692,646  
Long-term Debt, Maturities, Repayments of Principal in Year Five 69,418  
Long-term Debt, Maturities, Repayments of Principal after Year Five 2,486,856  
Debt Instrument, Unamortized Discount (Premium), Net 23,893  
Long-term Debt 3,683,738 $ 3,715,212
Unsecured Debt [Member]    
Debt Instrument [Line Items]    
Long-term Debt 2,521,940 $ 2,475,322
Scheduled Principal Payments [Member] | Mortgages [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 7,284  
Long-term Debt, Maturities, Repayments of Principal in Year Two 11,287  
Long-term Debt, Maturities, Repayments of Principal in Year Three 11,599  
Long-term Debt, Maturities, Repayments of Principal in Year Four 11,798  
Long-term Debt, Maturities, Repayments of Principal in Year Five 10,043  
Long-term Debt, Maturities, Repayments of Principal after Year Five 27,013  
Debt Instrument, Unamortized Discount (Premium), Net 0  
Long-term Debt 79,024  
Mortgage Loan Maturities [Member] | Mortgages [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 13,216  
Long-term Debt, Maturities, Repayments of Principal in Year Two 39,074  
Long-term Debt, Maturities, Repayments of Principal in Year Three 76,251  
Long-term Debt, Maturities, Repayments of Principal in Year Four 5,848  
Long-term Debt, Maturities, Repayments of Principal in Year Five 59,375  
Long-term Debt, Maturities, Repayments of Principal after Year Five 209,843  
Debt Instrument, Unamortized Discount (Premium), Net (5,315)  
Long-term Debt 408,922  
Unsecured Maturities [Member] | Unsecured Debt [Member]    
Debt Instrument [Line Items]    
Long-term Debt, Maturities, Repayments of Principal, Remainder of Fiscal Year 0  
Long-term Debt, Maturities, Repayments of Principal in Year Two 300,000  
Long-term Debt, Maturities, Repayments of Principal in Year Three 0  
Long-term Debt, Maturities, Repayments of Principal in Year Four 675,000  
Long-term Debt, Maturities, Repayments of Principal in Year Five 0  
Long-term Debt, Maturities, Repayments of Principal after Year Five 2,250,000  
Debt Instrument, Unamortized Discount (Premium), Net 29,208  
Long-term Debt $ 3,195,792