Segment Information (Schedule Of Operating Results By Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010	Dec. 31, 2010
Segment Reporting Information [Line Items]
Net interest income	$ 70,022	$ 68,721	$ 139,335	$ 136,101
Provision for loan losses	12,516	13,250	26,616	29,800
Other income (loss) and security gains	30,500	20,162	52,165	45,176
Other expense	47,007	47,001	93,353	94,891
Net income (loss)	28,953	21,166	51,149	41,945
Assets	7,322,024	7,093,098	7,322,024	7,093,098	7,282,261
PNB [Member]
Segment Reporting Information [Line Items]
Net interest income	60,542	59,612	120,779	118,011
Provision for loan losses	4,975	3,800	9,950	8,550
Other income (loss) and security gains	30,403	20,840	53,300	45,618
Other expense	36,315	35,752	72,636	72,554
Net income (loss)	34,250	27,850	63,279	56,185
Assets	6,565,419	6,215,606	6,565,419	6,215,606
VB Restated [Member]
Segment Reporting Information [Line Items]
Net interest income	7,000	6,914	13,755	13,805
Provision for loan losses	7,016	8,900	15,616	20,200
Other income (loss) and security gains	1,656	(756)	339	(605)
Other expense	8,174	8,237	15,599	16,091
Net income (loss)	(4,219)	(6,756)	(11,065)	(14,212)
Assets	743,980	863,315	743,980	863,315
All Other [Member]
Segment Reporting Information [Line Items]
Net interest income	2,480	2,195	4,801	4,285
Provision for loan losses	525	550	1,050	1,050
Other income (loss) and security gains	(1,559)	78	(1,474)	163
Other expense	2,518	3,012	5,118	6,246
Net income (loss)	(1,078)	72	(1,065)	(28)
Assets	$ 12,625	$ 14,177	$ 12,625	$ 14,177