Segment Information (Schedule Of Operating Results By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012 segments	Sep. 30, 2011	Dec. 31, 2011 segments
Segment Reporting Information [Line Items]
Number of Operating Segments			3		2
Net interest income	$ 58,016	$ 67,620	$ 178,424	$ 206,955
Provision for loan losses	16,655	16,438	30,231	43,054
Other income and security gains	18,079	21,492	75,207	73,657
Other expense	45,683	45,599	139,957	138,952
Income (loss) before income taxes	13,757	27,075	83,443	98,606
Income Tax Expense (Benefit)	1,775	6,694	21,100	27,076
Net income	11,982	20,381	62,343	71,530
Assets	6,752,938	7,095,098	6,752,938	7,095,098	6,972,245
PNB [Member]
Segment Reporting Information [Line Items]
Net interest income	55,366	58,588	167,234	179,366
Provision for loan losses	4,125	9,000	12,553	18,950
Other income and security gains	18,150	20,290	52,511	73,590
Other expense	39,609	35,936	114,925	108,572
Income (loss) before income taxes	29,782	33,942	92,267	125,434
Income Tax Expense (Benefit)	7,714	9,424	25,155	37,636
Net income	22,068	24,518	67,112	87,798
Assets	6,601,785	6,346,125	6,601,785	6,346,125
VB [Member]
Segment Reporting Information [Line Items]
Net interest income		6,493		20,248
Provision for loan losses		6,913		22,529
Other income and security gains		2,014		2,352
Other expense		7,267		22,866
Income (loss) before income taxes		(5,673)	0	(22,795)
Income Tax Expense (Benefit)		(2,008)	0	(8,065)
Net income		(3,665)		(14,730)
Assets		714,674		714,674
GFSC [Member]
Segment Reporting Information [Line Items]
Net interest income	2,371	2,242	6,887	6,462
Provision for loan losses	184	525	634	1,575
Other income and security gains
Other expense	693	646	2,120	1,862
Income (loss) before income taxes	1,494	1,071	4,133	3,025
Income Tax Expense (Benefit)	523	375	1,447	1,060
Net income	971	696	2,686	1,965
Assets	49,921	46,449	49,921	46,449
SEPH [Member]
Segment Reporting Information [Line Items]
Net interest income	(888)	(375)	597	(599)
Provision for loan losses	12,346		17,044
Other income and security gains	(191)	(894)	22,425	(2,535)
Other expense	4,008	240	18,172	272
Income (loss) before income taxes	(17,433)	(1,509)	(12,194)	(3,406)
Income Tax Expense (Benefit)	(6,102)	(528)	(4,282)	(1,192)
Net income	(11,331)	(981)	(7,912)	(2,214)
Assets	116,192	36,604	116,192	36,604
All Other [Member]
Segment Reporting Information [Line Items]
Net interest income	1,167	672	3,706	1,478
Provision for loan losses
Other income and security gains	120	82	271	250
Other expense	1,373	1,510	4,740	5,380
Income (loss) before income taxes	(86)	(756)	(763)	(3,652)
Income Tax Expense (Benefit)	(360)	(569)	(1,220)	(2,363)
Net income	274	(187)	457	(1,289)
Assets	$ (14,960)	$ (48,754)	$ (14,960)	$ (48,754)