Fair Value (Fair Value Of Financial Instruments) (Details) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and money market instruments	$ 246,892,000	$ 219,180,000
Investment securities	1,757,147,000	1,754,140,000
Loans Held-for-sale, Fair Value Disclosure	7,852,000	9,387,000
Derivative Assets	300,000	300,000
Impaired Loan Fair Value	827,000	1,103,000
Other loans	6,713,878,000	6,783,848,000
Loans receivable, net	6,722,858,000	6,794,671,000
Time deposits	696,789,000	714,307,000
Other	2,770,000	1,465,000
Total deposits	699,559,000	715,772,000
Short-term borrowings	205,927,000	238,786,000
Subordinated debentures/notes	201,516,000	207,912,000
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	86,000	262,000
Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	301,000	333,000
Impaired Loan Fair Value		1,103,000
Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swap	923,000	1,952,000
Loans [Member] | Estimate of Fair Value Measurement [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	923,000	1,952,000
Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	2,037,000	2,129,000
Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swap	226,000	226,000
Fair Value, Inputs, Level 1 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and money market instruments	246,892,000	219,180,000
Derivative Assets	0	0
Other	2,770,000	1,465,000
Total deposits	2,770,000	1,465,000
Fair Value, Inputs, Level 1 [Member] | Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Fair Value, Inputs, Level 1 [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	1,546,000	1,630,000
Fair Value, Inputs, Level 2 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	1,757,147,000	1,754,140,000
Loans Held-for-sale, Fair Value Disclosure	7,852,000	9,387,000
Derivative Assets	301,000	333,000
Loans receivable, net	8,153,000	9,720,000
Time deposits	696,789,000	714,307,000
Total deposits	696,789,000	714,307,000
Short-term borrowings	205,927,000	238,786,000
Subordinated debentures/notes	201,516,000	207,912,000
Fair Value, Inputs, Level 2 [Member] | Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	923,000	1,952,000
Swap	923,000	1,952,000
Fair Value, Inputs, Level 2 [Member] | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Unrealized Gain (Loss) on Cash Flow Hedging Instruments	86,000	262,000
Fair Value, Inputs, Level 3 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Impaired Loan Fair Value	827,000	1,103,000
Other loans	6,713,878,000	6,783,848,000
Loans receivable, net	6,714,705,000	6,784,951,000
Fair Value, Inputs, Level 3 [Member] | Loans [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative Assets	0	0
Fair Value, Inputs, Level 3 [Member] | Equity Securities [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investment securities	491,000	499,000
Fair Value, Inputs, Level 3 [Member] | Swap [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Swap	$ 226,000	$ 226,000