Consolidated Statements Of Changes In Stockholders' Equity (USD $)	Trust Preferred Securities [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Noncontrolling Interest [Member]	Total
Balance at Dec. 31, 2008 (Previously Reported [Member])	$ 240,554,000	$ 537,000	$ 508,613,000	$ 23,327,000	$ 645,592,000	$ (125,736,000)	$ 0	$ 1,292,887,000
Balance at Dec. 31, 2008	240,554,000	537,000	508,613,000	23,327,000	645,592,000	(125,736,000)	8,500,000	1,301,387,000
Balance, Shares at Dec. 31, 2008 (Previously Reported [Member])	258,000	49,508,250
Balance, Shares at Dec. 31, 2008	258,000	49,508,250
Adjustment to initially apply FASB No. 160 at Jan. 01, 2009 (Previously Reported [Member])							8,500,000	8,500,000
Adjustment to initially apply FASB No. 160								8,500,000
Forfeiture of restricted stock, Shares		(20,000)						6,553
Issuances of common stock - Common stock issuance		139,000	119,309,000					119,448,000
Issuances of common stock - Common stock issuance, Shares		13,869,856						13,869,856
Dividend Reinvestment Plan		1,000	1,159,000					1,160,000
Dividend Reinvestment Plan, Shares		87,241
Restricted stock units vested, Shares		12,963						12,963
Stock options exercised			13,000					13,000
Stock options exercised, Shares		1,280						1,280
Tax short-fall from stock options			(196,000)					(196,000)
Stock-based compensation			5,725,000					5,725,000
Cash dividends					(10,276,000)			(10,276,000)
Discount accretion and other adjustment on preferred stock	3,413,000				(3,438,000)			(25,000)
Dividends on preferred stock					(12,900,000)		(611,000)	(13,511,000)
Change in other comprehensive loss				(24,202,000)				(24,202,000)
Net income/(loss)					(67,390,000)		611,000	(66,779,000)
Balance at Dec. 31, 2009	243,967,000	677,000	634,623,000	(875,000)	551,588,000	(125,736,000)	8,500,000	1,312,744,000
Balance, Shares at Dec. 31, 2009	258,000	63,459,590
Forfeiture of restricted stock, Shares								6,055
Issuances of common stock - Common stock issuance		150,000	124,778,000					124,928,000
Issuances of common stock - Common stock issuance, Shares		15,028,409						15,028,409
Dividend Reinvestment Plan			310,000					310,000
Dividend Reinvestment Plan, Shares		28,778
Restricted stock units vested, Shares		15,006						15,006
Tax short-fall from stock options			(539,000)					(539,000)
Stock-based compensation			3,337,000					3,337,000
Cash dividends					(3,140,000)			(3,140,000)
Discount accretion and other adjustment on preferred stock	3,488,000				(3,488,000)
Dividends on preferred stock					(12,900,000)		(610,000)	(13,510,000)
Redemption of noncontrolling interest							(53,000)	(53,000)
Change in other comprehensive loss				(147,000)				(147,000)
Net income/(loss)					11,565,000		610,000	12,175,000
Balance at Dec. 31, 2010	247,455,000	827,000	762,509,000	(1,022,000)	543,625,000	(125,736,000)	8,447,000	1,436,105,000
Balance, Shares at Dec. 31, 2010	258,000	78,531,783
Forfeiture of restricted stock, Shares								2,578
Dividend Reinvestment Plan		1,000	286,000					287,000
Dividend Reinvestment Plan, Shares		21,281
Restricted stock units vested, Shares		12,633						12,633
Stock options exercised		1,000	1,306,000					1,307,000
Stock options exercised, Shares		86,860						86,860
Tax short-fall from stock options			(218,000)					(218,000)
Stock-based compensation			1,758,000					1,758,000
Cash dividends					(3,146,000)			(3,146,000)
Discount accretion and other adjustment on preferred stock	3,537,000				(3,537,000)
Dividends on preferred stock					(12,900,000)		(605,000)	(13,505,000)
Change in other comprehensive loss				(7,710,000)				(7,710,000)
Net income/(loss)					100,150,000		605,000	100,755,000
Balance at Dec. 31, 2011	$ 250,992,000	$ 829,000	$ 765,641,000	$ (8,732,000)	$ 624,192,000	$ (125,736,000)	$ 8,447,000	$ 1,515,633,000
Balance, Shares at Dec. 31, 2011	258,000	78,652,557