Parent Company Financial Statements (Schedule Of Condensed Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011		Dec. 31, 2010		Dec. 31, 2009
Condensed Financial Statements, Captions [Line Items]
Other income									$ 12,674		$ 11,271		$ 9,469
Other expenses									29,614		32,576		18,086
Income tax benefit	10,722	10,717	8,782	6,521	4,203	2,194	2,800	(3,392)	36,742		5,805		(40,937)
Net income (loss)	21,382	21,862	17,785	13,467	8,158	8,191	3,463	8,514	74,496		28,326		(153,366)
Preferred stock dividends								12,192			12,192		12,866
Dividends and undistributed earnings allocated to participating securities	103	105	86	62	18	18	16	15	356	[1]	67	[1]	30	[1]
Net earnings (loss) available to common shareholders	21,279	21,757	17,699	13,405	8,140	8,173	3,447	(3,693)	74,140		16,067		(166,262)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Dividends from subsidiaries									17,743		245		18,306
Other income									(2,127)		5,081		6,656
Total income									15,616		5,326		24,962
Management fees paid to subsidiaries									469		291		305
Other expenses									9,072		9,116		10,079
Total expenses									9,541		9,407		10,384
Income (loss) before income tax benefit and equity in undistributed earnings of subsidiaries									6,075		(4,081)		14,578
Income tax benefit									(4,325)		(1,594)		(1,677)
Net income (loss) before equity in undistributed earnings of subsidiaries									10,400		(2,487)		16,255
Equity in (distributions in excess) undistributed earnings of subsidiaries									64,096		30,813		(169,621)
Net income (loss)									74,496		28,326		(153,366)
Preferred stock dividends											12,192		12,866
Dividends and undistributed earnings allocated to participating securities									356		67		30
Net earnings (loss) available to common shareholders									$ 74,140		$ 16,067		$ (166,262)

[1] Represents dividends paid and undistributed earnings allocated to nonvested restricted stock awards.