Unsecured Revolving Credit Facility And Term Loans (Schedule Of Defined Leverage Ratio, Including Interest Rate, Alternate Base Rate Loans, And Facility Fee) (Details) - 2017 Credit Facility [Member]
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6 Months Ended |
Jun. 30, 2019 |
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| Debt Instrument [Line Items] |
|
| Facility Fee Basis Points |
0.25%
|
| 45% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.25%
|
| Facility Fee Basis Points |
0.20%
|
| 45% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
45.00%
|
| 45% And 50% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.30%
|
| Facility Fee Basis Points |
0.25%
|
| 45% And 50% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
45.00%
|
| 45% And 50% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
50.00%
|
| 50% And 55% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.35%
|
| Facility Fee Basis Points |
0.30%
|
| 50% And 55% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
50.00%
|
| 50% And 55% Unsecured Term Loan Leverage Ratio [Member] | Maximum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
55.00%
|
| 55% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
1.60%
|
| Facility Fee Basis Points |
0.35%
|
| 55% Unsecured Term Loan Leverage Ratio [Member] | Minimum [Member] |
|
| Debt Instrument [Line Items] |
|
| Leverage ratio |
55.00%
|
| Base Rate [Member] | 45% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
0.25%
|
| Base Rate [Member] | 45% And 50% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
0.30%
|
| Base Rate [Member] | 50% And 55% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
0.35%
|
| Base Rate [Member] | 55% Unsecured Term Loan Leverage Ratio [Member] |
|
| Debt Instrument [Line Items] |
|
| Interest Rate - Applicable Basis Points Above LIBOR |
0.60%
|