Redeemable Preferred Stock (Details) (USD $)	1 Months Ended	3 Months Ended	12 Months Ended	30 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2009 Tranche	Mar. 31, 2015	Dec. 31, 1998	Jun. 30, 1995	Mar. 31, 2014	Sep. 30, 2014	Jun. 30, 2006	Dec. 31, 2014	Dec. 31, 1991	Dec. 31, 1990
Class of Stock [Line Items]
Preferred stock authorized (in shares)		6,000,000
Preferred stock par value (in dollar per share)		$ 0.01
Dividends Payable		$ 89,200,000
Senior Redeemable Preferred Stock [Abstract]
Redeemable preferred stock liquidation value (in dollar per share)		$ 1,000				1,000
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)		39.30%
12% Cumulative Exchangeable Redeemable Preferred Stock [Abstract]
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)		$ 1.20
Preferred stock, liquidation preference (in dollars per share)		$ 10
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
Senior Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock dividend rate per annum (in hundredths)		14.125%
Senior Redeemable Preferred Stock [Abstract]
Undeclared unpaid dividends		1,500,000						1,500,000
Accrued dividends reported as interest expenses		16,000			16,000
Senior Redeemable Preferred Stock [Member] | Toxford [Member]
Senior Redeemable Preferred Stock [Abstract]
Senior redeemable preferred stock maturity date						Feb. 28, 2017
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)		76.40%
Senior Redeemable Preferred Stock [Member] | Porter [Member]
Senior Redeemable Preferred Stock [Abstract]
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)		6.30%
Senior Redeemable Preferred Stock [Member] | Porter And Toxford [Member]
Senior Redeemable Preferred Stock [Abstract]
Percentage of redeemable preferred stock held by related party after redemption (in hundredths)		82.70%
Public Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock dividend rate per annum (in hundredths)		12.00%						12.00%	6.00%	6.00%
Dividends Payable								88,200,000
Carrying value of redeemable preferred stock		121,100,000						120,100,000
Preferred stock issued and outstanding (in shares)		3,185,586								2,858,723
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
Preferred stock dividend rate per annum (in dollars per share)									$ 0.60	$ 0.60
Dividends on preferred stock		$ 1,000,000			$ 1,000,000
Series A-1 Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock authorized (in shares)		1,250
Preferred stock issued and outstanding (in shares)								197
Senior Redeemable Preferred Stock [Abstract]
Related party preferred stock held after redemption (in shares)		163
Series A-1 Preferred Stock [Member] | Public Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock issued and outstanding (in shares)		3,185,586
Series A-2 Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock authorized (in shares)						1,750
Preferred stock par value (in dollar per share)						0.01
Preferred stock issued and outstanding (in shares)		276						276
Senior Redeemable Preferred Stock [Abstract]
Related party preferred stock held after redemption (in shares)		228
Series A-2 Preferred Stock [Member] | Senior Redeemable Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock issued and outstanding (in shares)		197
Class A Common Stock [Member] | Porter And Toxford [Member]
Senior Redeemable Preferred Stock [Abstract]
Common stock held by related parties (in hundredths)		39.30%