Segment Information (Schedule Of Operating Results By Segment) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($) segments	Mar. 31, 2019 USD ($)	Dec. 31, 2019 USD ($)
Segment Reporting Information [Line Items]
Number of Operating Segments | segments	2
Net interest income	$ 76,283	$ 67,776
Provision for (recovery of) loan losses	5,153	2,498
Other income and security gains	22,486	22,025
Total other expense	66,276	56,827
Income (loss) before income taxes	27,340	30,476
Income Tax Expense (Benefit)	4,968	5,021
Net Income	22,372	25,455
Assets	8,719,291	7,852,246	$ 8,558,377
PNB [Member]
Segment Reporting Information [Line Items]
Net interest income	75,214	66,282
Provision for (recovery of) loan losses	5,534	2,440
Other income and security gains	23,481	20,708
Total other expense	61,368	51,974
Income (loss) before income taxes	31,793	32,576
Income Tax Expense (Benefit)	5,885	5,884
Net Income	25,908	26,692
Assets	8,673,683	7,801,148
GFSC [Member]
Segment Reporting Information [Line Items]
Net interest income	1,152	1,325
Provision for (recovery of) loan losses	277	145
Other income and security gains	32	32
Total other expense	765	845
Income (loss) before income taxes	142	367
Income Tax Expense (Benefit)	30	80
Net Income	112	287
Assets	24,354	30,238
All Other [Member]
Segment Reporting Information [Line Items]
Net interest income	(83)	169
Provision for (recovery of) loan losses	(658)	(87)
Other income and security gains	(1,027)	1,285
Total other expense	4,143	4,008
Income (loss) before income taxes	(4,595)	(2,467)
Income Tax Expense (Benefit)	(947)	(943)
Net Income	(3,648)	(1,524)
Assets	$ 21,254	$ 20,860