Consolidated Statements of Changes in Shareholders' Equity (USD $) In Thousands	Series B Preferred Stock [Member] Accumulated Deficit [Member]	Series B Preferred Stock [Member]	Mandatory Convertible Preferred Stock [Member] Accumulated Deficit [Member]	Mandatory Convertible Preferred Stock [Member]	Stock Issued To Directors [Member] Common Stock [Member]	Stock Issued To Directors [Member] Additional Paid-in Capital [Member]	Stock Issued To Directors [Member]	Bonuses Paid Through Stock Issuances [Member] Common Stock [Member]	Bonuses Paid Through Stock Issuances [Member] Additional Paid-in Capital [Member]	Bonuses Paid Through Stock Issuances [Member]	Series B Preferred Stock [Member]	Series C Mandatory Convertible Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Total
Balances at Dec. 31, 2009											$ 39	$ 504	$ 59,604	$ 1,121,076	$ (300,915)	$ (14,183)	$ (640)	$ 865,485
Net income															48,983			48,983
Options granted														1,121				1,121
Options exercised													174	3,743			(718)	3,199
Share based compensation					20	410	430	262	(262)
Warrants exercised													3,553	46,341				49,894
Mandatory Convertible Preferred Stock dividends paid in common stock													971	5,547				6,518
Other comprehensive income (loss)																(934)		(934)
Preferred stock dividends declared	(552)	(552)	(13,093)	(13,093)														13,633
Restricted stock units granted														1,895				1,895
Restricted stock unit distributions													120	(120)			(693)	(693)
Balances at Dec. 31, 2010											39	504	64,704	1,179,751	(265,577)	(15,117)	(2,051)	962,253
Net income															151,164			151,164
Options exercised													19	460				479
Share based compensation					11	331	342	2	58	60
Warrants exercised													536	4,771				5,307
Common stock issued for assets purchased (5,396,000 shares)													1,349	32,482				33,831
Mandatory Convertible Preferred Stock dividends paid in common stock												504	4,719	(4,215)
Other comprehensive income (loss)																(8,381)		(8,381)
Preferred stock dividends declared	(552)	(552)																552
Common stock dividends declared															(5,592)			(5,592)
Restricted stock units granted														1,671				1,671
Restricted stock unit distributions													80	(80)			(469)	(469)
Balances at Dec. 31, 2011											39		71,420	1,215,229	(120,557)	(23,498)	(2,520)	1,140,113
Net income															14,954			14,954
Share based compensation													19	336				355
Other comprehensive income (loss)																(420)		(420)
Preferred stock dividends declared	(552)	(552)																552
Common stock dividends declared													1	11	(17,133)			(17,121)
Restricted stock units granted														2,746				2,746
Restricted stock unit distributions													59	(39)			(203)	(183)
Repurchase of common shares (350,000 shares)																	(1,941)	(1,941)
Balances at Dec. 31, 2012											$ 39		$ 71,499	$ 1,218,283	$ (123,288)	$ (23,918)	$ (4,664)	$ 1,137,951