Subsequent Events (Details) (New Contract [Member], USD $) In Millions, unless otherwise specified	0 Months Ended
	Nov. 03, 2011 periods sqft
New Contract [Member]
Subsequent Event [Line Items]
Square footage of aggregate agreed-upon rentable area	154,100
Building lease term	14 years 8 months
Number of optional lease renewal periods	2
Optional lease renewal period	5 years
Initial annual basic rent amount	$ 3.8
Percentage of annual increase in basic rent rate	2.00%