Consolidated Statements of Changes in Stockholders’ Equity (USD $)	Preferred Stock [Member] Series B Preferred Stock [Member]	Preferred Stock [Member] Series C Mandatory Convertible Preferred Stock [Member] Mandatory Convertible Preferred Stock [Member]	Preferred Stock [Member] Series C Mandatory Convertible Preferred Stock [Member]	Common Stock [Member] Mandatory Convertible Preferred Stock [Member]	Common Stock [Member] Stock Issued To Directors [Member]	Common Stock [Member] Bonuses Paid Through Stock Issuances [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Mandatory Convertible Preferred Stock [Member]	Additional Paid-in Capital [Member] Stock Issued To Directors [Member]	Additional Paid-in Capital [Member] Bonuses Paid Through Stock Issuances [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member] Series B Preferred Stock [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Series B Preferred Stock [Member]	Stock Issued To Directors [Member]	Bonuses Paid Through Stock Issuances [Member]	Total
Balances, at Dec. 31, 2010	$ 39,000		$ 504,000				$ 64,704,000				$ 1,179,751,000		$ (265,577,000)	$ (15,117,000)	$ (2,051,000)				$ 962,253,000
Net income (loss)													151,164,000						151,164,000
Options exercised (78,000 shares)							19,000				460,000								479,000
Bonuses and other compensation and Stock issued to directors					11,000	2,000			331,000	58,000							342,000	60,000
6.5% Mandatory Convertible Preferred Stock dividends paid in common stock (18,872,000 shares)		(504,000)		4,719,000				(4,215,000)
Warrants exercised							536,000				4,771,000								5,307,000
Other comprehensive loss														(8,381,000)					(8,381,000)
Series B Preferred Stock dividends declared												(552,000)				(552,000)			552,000
Common stock dividends declared													(5,592,000)						(5,592,000)
Restricted stock units granted											1,671,000								1,671,000
Restricted stock unit distributions							80,000				(80,000)				(469,000)				(469,000)
Common stock issued for assets purchased							1,349,000				32,482,000								33,831,000
Balances, at Dec. 31, 2011	39,000						71,420,000				1,215,229,000		(120,557,000)	(23,498,000)	(2,520,000)				1,140,113,000
Net income (loss)													14,954,000						14,954,000
Bonuses and other compensation and Stock issued to directors					19,000				336,000								355,000
Warrants exercised																			0
Other comprehensive loss														(420,000)					(420,000)
Series B Preferred Stock dividends declared												(552,000)				(552,000)			552,000
Repurchase of common shares															(1,941,000)				(1,941,000)
Common stock dividends declared							1,000				11,000		(17,133,000)						(17,121,000)
Restricted stock units granted											2,746,000								2,746,000
Restricted stock unit distributions							59,000				(39,000)				(203,000)				(183,000)
Balances, at Dec. 31, 2012	39,000						71,499,000				1,218,283,000		(123,288,000)	(23,918,000)	(4,664,000)				1,137,951,000
Net income (loss)													(25,130,000)						(25,130,000)
Bonuses and other compensation and Stock issued to directors							31,000				356,000								387,000
Warrants exercised							6,000				55,000								61,000
Other comprehensive loss														(2,381,000)					(2,381,000)
Series B Preferred Stock dividends declared												(552,000)				(552,000)			552,000
Repurchase of common shares															(286,000)				(286,000)
Common stock dividends declared							2,000				19,000		(6,012,000)		(71,000)				(6,062,000)
Restricted stock units granted											4,188,000								4,188,000
Restricted stock unit distributions							109,000				(109,000)				(59,000)				(59,000)
Common stock issued for assets purchased							14,249,000				204,053,000								218,302,000
Balances, at Dec. 31, 2013	$ 39,000						$ 85,896,000				$ 1,426,845,000		$ (154,982,000)	$ (26,299,000)	$ (5,080,000)				$ 1,326,419,000