Subsequent Events (Details 2) (ClearPoint, USD $) In Thousands, unless otherwise specified					3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Credit facility	Dec. 31, 2011 Credit facility	Mar. 31, 2013 Credit facility Subsequent event
Subsequent Event [Line Items]
Facility Limit	$ 90,000	$ 300,000	$ 90,000	$ 250,000	$ 10,000
Written notice period required for termination					5 days