Segment Information (Schedule Of Operating Results By Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segments	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segments	1
Net interest income	$ 80,734	$ 76,283
(Recovery of) provision for credit losses	(4,855)	5,153
Other income and security gains	34,089	22,486
Total other expense	67,865	66,276
Income (loss) before income taxes	51,813	27,340
Income Tax Expense (Benefit)	8,982	4,968
Net Income	42,831	22,372
Assets	9,914,069	8,719,291	$ 9,279,021
PNB [Member]
Segment Reporting Information [Line Items]
Net interest income	82,086	75,214
(Recovery of) provision for credit losses	(4,194)	5,534
Other income and security gains	32,800	23,481
Total other expense	63,576	61,368
Income (loss) before income taxes	55,504	31,793
Income Tax Expense (Benefit)	10,382	5,885
Net Income	45,122	25,908
Assets	9,884,055	8,673,683
All Other [Member]
Segment Reporting Information [Line Items]
Net interest income	(1,352)	1,069
(Recovery of) provision for credit losses	(661)	(381)
Other income and security gains	1,289	(995)
Total other expense	4,289	4,908
Income (loss) before income taxes	(3,691)	(4,453)
Income Tax Expense (Benefit)	(1,400)	(917)
Net Income	(2,291)	(3,536)
Assets	$ 30,014	$ 45,608