Redeemable Preferred Stock (Details) (USD $)	3 Months Ended		6 Months Ended		12 Months Ended			3 Months Ended		6 Months Ended		12 Months Ended								6 Months Ended		3 Months Ended	6 Months Ended	12 Months Ended		30 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 1998	Dec. 31, 1991	Dec. 31, 1990	Jun. 30, 2012 Senior Redeemable Preferred Stock [Member]	Jun. 30, 2011 Senior Redeemable Preferred Stock [Member]	Jun. 30, 2012 Senior Redeemable Preferred Stock [Member]	Jun. 30, 2011 Senior Redeemable Preferred Stock [Member]	Dec. 31, 2011 Senior Redeemable Preferred Stock [Member]	Dec. 31, 2010 Senior Redeemable Preferred Stock [Member]	Dec. 31, 1991 Senior Redeemable Preferred Stock [Member]	May 16, 2012 Senior Redeemable Preferred Stock [Member]	May 11, 2012 Senior Redeemable Preferred Stock [Member]	Aug. 08, 2011 Senior Redeemable Preferred Stock [Member]	Apr. 08, 2011 Senior Redeemable Preferred Stock [Member]	Sep. 27, 2010 Senior Redeemable Preferred Stock [Member]	Jun. 30, 2012 Senior Redeemable Preferred Stock [Member] Toxford [Member]	Jun. 30, 2012 Senior Redeemable Preferred Stock [Member] Porter and Toxford [Member]	Jun. 30, 2006 Public Preferred Stock [Member]	Jun. 30, 2012 Public Preferred Stock [Member]	Dec. 31, 1991 Public Preferred Stock [Member]	Dec. 31, 1990 Public Preferred Stock [Member]	Jun. 30, 1995 Public Preferred Stock [Member]	Dec. 31, 2011 Public Preferred Stock [Member]	May 16, 2012 Series A-1 Preferred Stock [Member] Porter and Toxford [Member]	Apr. 08, 2011 Series A-1 Preferred Stock [Member] Porter and Toxford [Member]	Jun. 30, 2012 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	May 16, 2012 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Dec. 31, 2011 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Apr. 08, 2011 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Mar. 15, 2011 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member] Porter [Member]	Jun. 30, 2012 Series A-1 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member] Porter and Toxford [Member]	May 16, 2012 Series A-2 Preferred Stock [Member] Porter and Toxford [Member]	Apr. 08, 2011 Series A-2 Preferred Stock [Member] Porter and Toxford [Member]	Jun. 30, 2012 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	May 16, 2012 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Dec. 31, 2011 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Apr. 08, 2011 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member]	Mar. 15, 2011 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member] Porter [Member]	Jun. 30, 2012 Series A-2 Preferred Stock [Member] Senior Redeemable Preferred Stock [Member] Porter and Toxford [Member]	Jun. 30, 2012 Class A Common Stock [Member] Porter [Member]	Mar. 15, 2011 Class A Common Stock [Member] Porter [Member]	May 16, 2012 Class A Common Stock [Member] Porter and Toxford [Member]	Apr. 08, 2011 Class A Common Stock [Member] Porter and Toxford [Member]
Class of Stock [Line Items]
Preferred stock authorized (in shares)																							6,000,000							1,250								1,750
Preferred stock par value (in dollar per share)																							$ 0.01							$ 0.01								$ 0.01
Preferred stock dividend rate per annum (in hundredths)						6.00%	6.00%			14.125%													12.00%
Redeemable preferred stock															$ 2,200,000			$ 2,300,000	$ 522,000				$ 110,500,000				$ 108,600,000
Preferred stock issued and outstanding (in shares)							2,858,723																3,185,586				3,185,586			677	677	923	923					947	947	1,292	1,292
Senior Redeemable Preferred Stock [Abstract]
Redeemable preferred stock liquidation value (in dollar per share)								$ 1,000		$ 1,000
Percentage of redeemable preferred stock redeemed (in hundredths)															26.70%		22.30%		4.90%
Senior redeemable preferred stock maturity date																				Aug. 31, 2014
Maximum redemption of redeemable preferred stock																4,000,000			2,500,000
Minimum percentage of discount on redemption of redeemable preferred stock (hundredths)															10.00%				10.00%
Redemption amount of senior redeemable preferred stock															2,000,000			2,070,000	430,000
Gain on redemption of senior preferred stock			(222,000)	(230,000)							(230,000)	(222,000)	(92,000)
Percentage of discount on redemption of redeemable preferred stock (in hundredths)															10.00%			10.00%	17.50%
Common stock held by related parties (in hundredths)																																													44.00%	44.00%	44.00%
Number of redeemable preferred stock acquired by beneficial owner (in shares)																																		75								105
Related party preferred stock held after redemption (in shares)																												560	763						560	784	1,069						784
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)																				76.40%	82.70%																							6.30%
Undeclared unpaid dividends								4,500,000		4,500,000		6,000,000
Accrued dividends reported as interest expenses								64,000	80,000	142,000	179,000
12% Cumulative Exchangeable Redeemable Preferred Stock [Abstract]
Adjusted accrued accretion of public preferred stock																						1,500,000
Number of shares declared as dividend (in shares)																								736,863	736,863
Number of annual tranches during the period																										5
Period during which redeemable preferred stock not callable			12 months
Preferred stock dividend rate per annum (in dollars per share)														$ 0.60									$ 1.20		$ 0.60
Preferred stock, liquidation preference (in dollars per share)																							$ 10
Dividends on preferred stock	1,000,000	1,000,000	2,053,000	2,090,000
Accrued paid-in kind dividends																										4,000,000
Accrued paid-in cash dividends																										15,100,000
Redemption of public preferred stock (in shares)					410,000
Reduced amount of Paid in kind dividends due to redemption of public preferred stock																										3,500,000
Adjusted amount of accrued cash dividends due to redemption of public preferred stock																										9,900,000
Revised accrued dividends to reflect change from PIK dividends to cash dividends																										$ 13,400,000