Related Party Transactions (Details) (USD $)	9 Months Ended	12 Months Ended	3 Months Ended		9 Months Ended							9 Months Ended	12 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2013 Senior Redeemable Preferred Stock [Member]	Dec. 31, 2012 Senior Redeemable Preferred Stock [Member]	Sep. 30, 2013 Emmett Wood [Member]	Sep. 30, 2012 Emmett Wood [Member]	Sep. 30, 2013 Emmett Wood [Member]	Sep. 30, 2012 Emmett Wood [Member]	Sep. 30, 2013 Emmett Wood [Member] Class A Common Stock [Member]	Sep. 30, 2013 Emmett Wood [Member] Class B Common Stock [Member]	Sep. 30, 2013 Porter And Toxford [Member] Senior Redeemable Preferred Stock [Member]	Dec. 31, 2012 Porter And Toxford [Member] Senior Redeemable Preferred Stock [Member]	Sep. 30, 2013 Porter And Toxford [Member] Class A Common Stock [Member]	Sep. 30, 2013 Porter And Toxford [Member] Series A-1 Preferred Stock [Member]	Dec. 31, 2012 Porter And Toxford [Member] Series A-1 Preferred Stock [Member]	Sep. 30, 2013 Porter And Toxford [Member] Series A-2 Preferred Stock [Member]	Dec. 31, 2012 Porter And Toxford [Member] Series A-2 Preferred Stock [Member]
Related Party Transaction [Line Items]
Compensation to related parties			$ 69,000	$ 123,000	$ 193,000	$ 264,000
Number of shares held by related party (in shares)							650,000	50,000				163	359	228	502
Shares redeemed (in shares)	567	1,175										195	405	274	567
Percentage of of shares owned (in hundredths)									82.70%	82.70%	39.30%