Certain Relationships and Related Transactions (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 24, 2012	May 16, 2012	Jun. 14, 2013	Apr. 08, 2011
Related Party Transaction [Line Items]
Number of Senior Redeemable Preferred Stock redeemed by the Company (in shares)				1,175
Related party preferred stock held after redemption (in shares)				502
Emmett Wood [Member]
Related Party Transaction [Line Items]
Compensation to related parties	$ 446,000	$ 340,000	$ 386,000
Emmett Wood [Member] | Class A Common Stock [Member]
Related Party Transaction [Line Items]
Number of shares held by related party (in shares)	650,000	650,000
Emmett Wood [Member] | Class B Common Stock [Member]
Related Party Transaction [Line Items]
Number of shares held by related party (in shares)	50,000	50,000
Porter And Toxford [Member] | Class A Common Stock [Member]
Related Party Transaction [Line Items]
Common stock held by related parties (in hundredths)				39.30%	39.30%
Porter And Toxford [Member] | Series A-1 Preferred Stock [Member]
Related Party Transaction [Line Items]
Number of Senior Redeemable Preferred Stock redeemed by the Company (in shares)				195			405
Related party preferred stock held after redemption (in shares)				359		163
Porter And Toxford [Member] | Series A-2 Preferred Stock [Member]
Related Party Transaction [Line Items]
Number of Senior Redeemable Preferred Stock redeemed by the Company (in shares)						274
Related party preferred stock held after redemption (in shares)						228
Porter And Toxford [Member] | Senior Redeemable Preferred Stock [Member]
Related Party Transaction [Line Items]
Number of Senior Redeemable Preferred Stock redeemed by the Company (in shares)				567		567
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)				82.70%		82.70%