Commitments and Contingencies - Luri Matter (Details Textual 3) (USD $)	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Mar. 20, 2013	May 19, 2011	Sep. 24, 2008	Jul. 03, 2008	Aug. 17, 2007 Employees
Commitments and Contingencies [Line Items]
Number of discharge or demote employees (in employees)											3
Total damage										$ 46,600,000
Punitive damages							500,000	7,000,000		43,100,000
Pre-judgment interest									300,000
Attorney fees and litigation costs									$ 1,100,000
Rate of post-judgment interest	3.00%	3.00%	4.00%	4.00%	5.00%	8.00%
Minimum [Member]
Commitments and Contingencies [Line Items]
Age of employees discharged or demoted (in years old)											50