Unsecured Term Loan (Schedule Of Interest Rate On Outstanding Borrowings Payable) (Details) - Unsecured Term Loan [Member]		3 Months Ended
	Jan. 07, 2016	Mar. 31, 2016
Line Of Credit Facility [Line Items]
Interest Rate - Applicable Basis Points Above LIBOR	1.40%
No Ratings Or Less Than Baa3 [Member] | BBB- Rating [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt Ratings		No ratings or less than BBB-/Baa3
Interest Rate - Applicable Basis Points Above LIBOR		1.85%
Baa3 [Member] | BBB- Rating [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt Ratings		BBB- or Baa3 (current interest rate based on Company's election)
Interest Rate - Applicable Basis Points Above LIBOR		1.40%
Baa2 [Member] | BBB [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt Ratings		BBB or Baa2
Interest Rate - Applicable Basis Points Above LIBOR		1.15%
Baa1 [Member] | BBB [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt Ratings		BBB+ or Baa1
Interest Rate - Applicable Basis Points Above LIBOR		1.00%
A3 Or Higher [Member] | A- Or Higher [Member]
Line Of Credit Facility [Line Items]
Unsecured Debt Ratings		A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR		0.90%