Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio) (Details)
|
3 Months Ended |
Mar. 31, 2021 |
|---|
| 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% (Current ratio) Unsecured 2017 Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.65%
|
| 50% And 55% (Current ratio) Unsecured 2017 Term Loan Leverage Ratio [Member] | Minimum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
50.00%
|
| 50% And 55% (Current ratio) 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% (Current ratio) Unsecured 2016 Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.65%
|
| 50% And 55% (Current ratio) Unsecured 2016 Term Loan Leverage Ratio [Member] | Minimum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
50.00%
|
| 50% And 55% (Current ratio) 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% (Current ratio) 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%
|