Consolidated Statements of Changes in Stockholders' Equity (USD $) In Thousands	Series B Preferred Stock [Member] Preferred Stock [Member]	Series B Preferred Stock [Member] Retained Earnings [Member]	Series B Preferred Stock [Member]	Common Stock [Member] Stock Issued to Directors [Member]	Common Stock [Member] Stock Issued for 401(k) Match [Member]	Common Stock [Member]	Additional Paid-in Capital [Member] Stock Issued to Directors [Member]	Additional Paid-in Capital [Member] Stock Issued for 401(k) Match [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Treasury Stock [Member]	Stock Issued to Directors [Member]	Stock Issued for 401(k) Match [Member]	Total
Balance at Dec. 31, 2011	$ 39					$ 71,420			$ 1,215,229	$ (120,557)	$ (23,498)	$ (2,520)			$ 1,140,113
Net income (loss)										14,954					14,954
Stock issued				19			336					(1,941)	355		(1,941)
Other comprehensive loss											(420)				(420)
Series B 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)
Balance at Dec. 31, 2012	39					71,499			1,218,283	(123,288)	(23,918)	(4,664)			1,137,951
Net income (loss)										(25,130)					(25,130)
Stock issued				31			356						387
Other comprehensive loss											(2,381)				(2,381)
Series B Preferred Stock dividends declared		(552)	(552)												(552)
Common stock issued for assets purchased (56,998,000 shares)						14,249			204,053						218,302
Common stock dividends declared						2			19	(6,012)		(71)			(6,062)
Repurchase of common shares												(286)			(286)
Restricted stock units granted									4,188						4,188
Restricted stock unit distributions						109			(109)			(59)			(59)
Warrants exercised						6			55						61
Balance at Dec. 31, 2013	39					85,896			1,426,845	(154,982)	(26,299)	(5,080)			1,326,419
Net income (loss)										17,824					17,824
Stock issued				37			438						475
Other comprehensive loss											(5,732)				(5,732)
Series B Preferred Stock dividends declared										(552)					(552)
Stock issued for 401(k) match (811,000 shares)					203			2,226						2,429
Common stock dividends declared						4			46	(3,596)					(3,546)
Repurchase of common shares												(1,501)			(1,501)
Restricted stock units granted									9,019						9,019
Restricted stock unit distributions						665			(665)			(2,279)			(2,279)
Warrants exercised						5,577			48,841						54,418
Balance at Dec. 31, 2014	$ 39					$ 92,382			$ 1,486,750	$ (141,306)	$ (32,031)	$ (8,860)			$ 1,396,974