XML 57 R45.htm IDEA: XBRL DOCUMENT v3.10.0.1
Debt - Line of Credit (Details) - Revolving Credit Facility - Wells Fargo, Merrill Lynch, Pierce Fenner & Smith, PNC Capital Markets Credit Facility - USD ($)
$ in Thousands
 6 Months Ended 12 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Line of Credit Facility [Line Items]    
Unsecured term loan credit facility $ 300,000 $ 300,000
Issuance costs, net of accumulated amortization (1,385) (1,615)
Total, unsecured term loan credit facilities, net 298,615 298,385
5-Year Tranche    
Line of Credit Facility [Line Items]    
Unsecured term loan credit facility $ 50,000 $ 50,000
Interest rate (percent) 3.2825% 2.6607%
5-Year Tranche | One-month LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable interest rate (percent) 1.30% 1.30%
5-Year Tranche | Interest Rate Swap One    
Line of Credit Facility [Line Items]    
Unsecured term loan credit facility $ 90,000 $ 90,000
Interest rate (percent) 2.651% 2.651%
5-Year Tranche | Interest Rate Swap One | One-month LIBOR    
Line of Credit Facility [Line Items]    
Derivative, basis spread on variable rate (percent) 1.30%  
5-Year Tranche | Interest Rate Swap Two    
Line of Credit Facility [Line Items]    
Unsecured term loan credit facility $ 60,000 $ 60,000
Interest rate (percent) 2.6525% 2.6525%
5-Year Tranche | Interest Rate Swap Two | One-month LIBOR    
Line of Credit Facility [Line Items]    
Derivative, basis spread on variable rate (percent) 1.30%  
7-Year Tranche    
Line of Credit Facility [Line Items]    
Unsecured term loan credit facility $ 100,000 $ 100,000
Interest rate (percent) 3.5825% 2.9607%
7-Year Tranche | One-month LIBOR    
Line of Credit Facility [Line Items]    
Basis spread on variable interest rate (percent) 1.60% 1.60%