Fair Value Measurement (Fair Value, by Balance Sheet Grouping) (Details) - USD ($)		Jun. 30, 2021	Dec. 31, 2020
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Available-for-sale investment securities		$ 8,162,000	$ 5,748,000
Held-to-maturity investment securities		156,579,000	132,794,000
Equity securities		508,000	515,000
Net loans and leases		228,620,000	276,701,000
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		636,347,000	303,724,000
Available-for-sale investment securities		8,162,000	5,748,000
Held-to-maturity investment securities		153,032,000	128,292,000
Equity securities		508,000	515,000
Loans held for sale		24,202,000	25,506,000
Net loans and leases		2,480,476,000	2,370,659,000
Restricted investment in bank stocks		6,816,000	7,594,000
Accrued interest receivable		10,638,000	3,619,000
Net Amounts Presented in the Consolidated Balance Sheets			489,000
Deposits		2,782,124,000	2,474,580,000
Short-term borrowings		196,889,000	125,617,000
Long-term debt	[1]	71,520,000	71,648,000
Subordinated debt		44,593,000	44,580,000
Accrued interest payable		2,122,000	2,007,000
Interest rate swap agreements		560,000
Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and cash equivalents		636,347,000	303,724,000
Available-for-sale investment securities		8,162,000	5,748,000
Held-to-maturity investment securities		156,579,000	132,794,000
Equity securities		508,000	515,000
Loans held for sale		24,690,000	26,262,000
Net loans and leases		2,570,478,000	2,444,105,000
Restricted investment in bank stocks		6,816,000	7,594,000
Accrued interest receivable		10,638,000	3,619,000
Net Amounts Presented in the Consolidated Balance Sheets			489,000
Deposits		2,785,202,000	2,496,799,000
Short-term borrowings		196,889,000	125,617,000
Long-term debt	[1]	71,496,000	70,498,000
Subordinated debt		46,291,000	43,098,000
Accrued interest payable		2,122,000	$ 2,007,000
Interest rate swap agreements		$ 560,000

[1] Long-term debt excludes finance lease obligations.