Restructuring and Other Charges (Details) (USD $)	3 Months Ended			9 Months Ended		12 Months Ended			9 Months Ended		12 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Mar. 31, 2009	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2012 Other Segments [Member] Restructuring Reserve 2012 [Member]	Dec. 31, 2012 The Deal, LLC [Member] Restructuring Reserve 2012 [Member]	Sep. 30, 2013 Restructuring Reserve 2012 [Member]	Sep. 30, 2012 Restructuring Reserve 2012 [Member]	Dec. 31, 2009 Restructuring Reserve 2009 [Member]
Restructuring and Other Charges (Details) [Line Items]
Restructuring Charges	$ 0	$ 3,046,104		$ 385,610	$ 6,039,797	$ 1,800,000	$ 3,400,000	$ 3,500,000	$ 0	$ 6,328,464	$ 3,500,000
Restructuring and Related Cost, Number of Positions Eliminated, Period Percent			8.00%