Related Party Transactions (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended						1 Months Ended
	Jul. 31, 2011 BCRC [Member] years	Jul. 31, 2010 BCRC [Member]	Jul. 31, 2009 BCRC [Member]	Jul. 31, 2011 SSF/VARE [Member]	Jul. 31, 2010 SSF/VARE [Member]	Jul. 31, 2009 SSF/VARE [Member]	Dec. 31, 2008 Board of Directors Chairman and Chief Executive Officer [Member]
Right to appoint the number of directors	4
Number of directors	9
Management agreement renewable period, years	1
Management fees and reimbursement of operating expenses	$ 6.9	$ 7.0	$ 8.0
Ownership interest				50.00%
Real estate commission expense				3.4	3.5	9.6
Prepaid real estate commission					2.4
Real estate revenue from leases				0.4	0.5	0.5
Sale of property							$ 14.0