Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details)

v2.4.0.6
Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
sqft
Dec. 31, 2011
Dec. 31, 2007
Mar. 31, 2012
sqft
Sep. 30, 2011
sqft
Subsequent Events [Abstract]          
Net Rentable Area 10,000     6,700 47,000
Severance Costs $ 1.0        
Restructuring Charges $ 1.1 $ 0.4 $ 1.0