Exchangeable Redeemable Preferred Stock Conversion (Details) $ / shares in Units, $ in Thousands				3 Months Ended	12 Months Ended					60 Months Ended
	Nov. 23, 2020 USD ($) $ / shares shares	Nov. 19, 2020 USD ($) $ / shares	Nov. 30, 1998 shares	Jun. 30, 2006 USD ($)	Dec. 31, 2020 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($)	Dec. 31, 1991 $ / shares shares	Dec. 31, 1990 shares	Dec. 31, 2009 Tranche	Apr. 18, 2017 USD ($)
Exchangeable Redeemable Preferred Stock [Abstract]
Conversion amount					$ 19,213	$ 0	$ 0
Gain on extinguishment of debt					$ (275)	$ 0	0
Preferred stock [Abstract]
Preferred stock authorized (in shares) | shares					10,000,000
Preferred stock par value (in dollars per share) | $ / shares					$ 0.01
Public Preferred Stock [Member]
Preferred stock [Abstract]
Preferred stock authorized (in shares) | shares					6,000,000
Preferred stock par value (in dollars per share) | $ / shares					$ 0.01
Preferred stock dividend rate per annum					12.00%	12.00%		6.00%
Dividends payable						$ 107,400
Public preferred stock, shares retired (in shares) | shares			410,000
Preferred stock issued and outstanding (in shares) | shares						3,185,586			2,858,723
12% Cumulative Exchangeable Redeemable Preferred Stock [Abstract]
Adjusted accrued accretion of public preferred stock				$ 1,500
Number of shares declared as dividend (in shares) | shares								736,863	736,863
Number of annual tranches during the period | Tranche										5
Preferred stock dividend rate per annum (in dollars per share) | $ / shares					$ 1.20			$ 0.60
Preferred stock, liquidation preference (in dollars per share) | $ / shares					$ 10
Dividends on preferred stock					$ 3,400	$ 3,800	$ 3,800
Exchangeable Redeemable Preferred Stock [Member]
Exchangeable Redeemable Preferred Stock [Abstract]
Liquidation value in cash transaction in condition 1					0.90
Liquidation value amount as per cash transaction in condition 2					0.85
Liquidation value in issuance of shares common stock in condition 1					0.90
Liquidation value in issuance of shares common stock in condition 2					0.15
Number of fractional shares (in shares) | shares					0
Conversion per share amount (in dollars per share) | $ / shares		$ 10
Conversion amount		$ 142,300
Amount received in cash by stock	$ 108,900
Number of shares stock holder received (in shares) | shares	1,100,000
Redemption price per share (in dollars per share) | $ / shares	$ 17
Amount received from converted shares	$ 19,200
Costs directly attributable to share redemption	220
Gain on extinguishment of debt	$ 14,000
Series A-1 Preferred Stock [Member]
Preferred stock [Abstract]
Preferred stock authorized (in shares) | shares					1,250
Preferred stock par value (in dollars per share) | $ / shares					$ 0.01
Series A-2 Preferred Stock [Member]
Preferred stock [Abstract]
Preferred stock authorized (in shares) | shares					1,750
Preferred stock par value (in dollars per share) | $ / shares					$ 0.01
Senior Redeemable Preferred Stock [Member]
Preferred stock [Abstract]
Preferred stock dividend rate per annum					14.125%
Senior Redeemable Preferred Stock [Abstract]
Redeemable preferred stock liquidation value (in dollar per share) | $ / shares					$ 1,000
Redemption amount of senior redeemable preferred stock											$ 2,100