Subsequent Events (Details) (Refinancing of Debt [Member], USD $)	0 Months Ended
	Jan. 05, 2012 years
Derivative, Fixed Interest Rate	2.66%
Term of interest rate swaps (in years)	4
LIBOR plus basis spread, basis spread	1.75%
Variable rate basis	LIBOR
Letters Of Credit [Member]
Length of Term Loan Facility (in Years)	5
Current unsecured revolving credit facility capacity	240,000,000
Line of credit facility, amount outstanding	0
Accordion Feature [Member]
New facility, additional borrowing capacity	110,000,000