Parent Company Condensed Financial Information (Statements Of Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2010	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Noninterest income		$ 15,936	$ 14,018	$ 18,564
Interest on subordinated debentures		6,010	5,821	5,130
Noninterest expenses	22,408	63,322	90,201	69,230
Total income (loss) before taxes and equity in undistributed income of subsidiaries		26,070	(111,952)	21,105
Taxes on income		9,883	(43,657)	9,738
Net income (loss)	(1,289)	16,187	(68,295)	11,367
Parent Company [Member]
Cash dividends from subsidiaries		70,175	160	159
Noninterest income		595	774	802
Investment income		340	31	352
Other operating income			45
Security gains				13
Total income		71,110	1,010	1,326
Interest on subordinated debentures		5,463	5,306	5,289
Noninterest expenses		3,187	2,107	1,263
Total expense		8,650	7,413	6,552
Total income (loss) before taxes and equity in undistributed income of subsidiaries		62,460	(6,403)	(5,226)
Taxes on income		(2,900)	(2,563)	(1,991)
Income (loss) before equity in undistributed income of subsidiaries		65,360	(3,840)	(3,235)
Equity in undistributed income (loss) of subsidiaries		(49,173)	(64,455)	14,602
Net income (loss)		$ 16,187	$ (68,295)	$ 11,367