Quarterly report pursuant to Section 13 or 15(d)

Unsecured Revolving Credit Facility (Change In The Operating Partnership's Unsecured Debt Ratings) (Details)

v2.4.0.8
Unsecured Revolving Credit Facility (Change In The Operating Partnership's Unsecured Debt Ratings) (Details)
6 Months Ended
Jul. 15, 2013
Jun. 30, 2013
No Ratings Or Less Than BBB-/Baa3 [Member]
Jun. 30, 2013
BBB- Or Baa3 [Member]
Jun. 30, 2013
BBB Or Baa2 (Current) [Member]
Jun. 30, 2013
BBB+ Or Baa1 [Member]
Jun. 30, 2013
A- Or A3 Or Higher [Member]
Line of Credit Facility [Line Items]            
Unsecured Debt Ratings   No ratings or less than BBB-/Baa3 BBB- or Baa3 BBB or Baa2(current) BBB+ or Baa1 A- or A3 or higher
Interest Rate - Applicable Basis Points Above LIBOR 1.25% 1.70% 1.30% 1.10% 1.00% 0.925%
Facility Fee Basis Points   0.35% 0.30% 0.20% 0.15% 0.125%