Annual report pursuant to Section 13 and 15(d)

Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio) (Details)

v3.10.0.1
Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio) (Details)
 12 Months Ended
Dec. 31, 2018
45% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.45%
45% Unsecured 2017 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 45.00%
45% And 50% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.55%
45% And 50% Unsecured 2017 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 45.00%
45% And 50% Unsecured 2017 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 50.00%
50% And 55% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.65%
50% And 55% Unsecured 2017 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 50.00%
50% And 55% Unsecured 2017 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 55.00%
55% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.95%
55% Unsecured 2017 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 55.00%
45% Unsecured 2016 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.45%
45% Unsecured 2016 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 45.00%
45% And 50% Unsecured 2016 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.55%
45% And 50% Unsecured 2016 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 45.00%
45% And 50% Unsecured 2016 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 50.00%
50% And 55% Unsecured 2016 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.65%
50% And 55% Unsecured 2016 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 50.00%
50% And 55% Unsecured 2016 Term Loan Leverage Ratio [Member] | Maximum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 55.00%
55% Unsecured 2016 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 1.95%
55% Unsecured 2016 Term Loan Leverage Ratio [Member] | Minimum [Member]  
Debt Instrument [Line Items]  
Leverage ratio 55.00%
Base Rate [Member] | 45% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 0.45%
Base Rate [Member] | 45% And 50% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 0.55%
Base Rate [Member] | 50% And 55% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 0.65%
Base Rate [Member] | 55% Unsecured 2017 Term Loan Leverage Ratio [Member]  
Debt Instrument [Line Items]  
Interest Rate - Applicable Basis Points Above LIBOR 0.95%