Fair Value Measurements (Carrying Amount, Estimated Fair Value, and Placement in Fair Value Hierarchy of Financial Instruments) (Details) - USD ($) $ in Thousands		Sep. 30, 2024	Dec. 31, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		$ 886,816	$ 887,730
Securities held to maturity, fair value		112,613	137,030
Accrued interest receivable		23,702	24,481
FHLB and FRB stock		16,186	17,406
Carrying Amount [Member] | Level 1 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents		249,569	124,442
Accrued interest receivable		23,702	24,481
Non-maturity deposits		3,799,837	3,808,216
Short-term borrowings		55,000	185,000
Accrued interest payable		27,453	19,412
Carrying Amount [Member] | Level 2 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		886,816	887,730
Securities held to maturity, fair value		121,279	148,156
Loans held for sale		2,495	1,370
Loans		4,300,302	4,373,541
FHLB and FRB stock		16,186	17,406
Time deposits		1,506,764	1,404,696
Long-term borrowings		124,765	124,532
Carrying Amount [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		4,097	5,939
Derivative instruments, liabilities		31	0
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		31,597	37,517
Derivative instruments, liabilities		31,600	37,519
Carrying Amount [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		159	50
Derivative instruments, liabilities		14	2
Carrying Amount [Member] | Level 3 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans	[1]	58,009	37,516
Long-lived assets held for sale		629	629
Estimated Fair Value [Member] | Level 1 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents		249,569	124,442
Accrued interest receivable		23,702	24,481
Non-maturity deposits		3,799,837	3,808,216
Short-term borrowings		55,000	185,000
Accrued interest payable		27,453	19,412
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		886,816	887,730
Securities held to maturity, fair value		112,613	137,030
Loans held for sale		2,495	1,370
Loans		4,153,946	4,143,918
FHLB and FRB stock		16,186	17,406
Time deposits		1,505,625	1,398,352
Long-term borrowings		130,209	128,363
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Cash Flow Hedging [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		4,097	5,939
Derivative instruments, liabilities		31	0
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		31,597	37,517
Derivative instruments, liabilities		31,600	37,519
Estimated Fair Value [Member] | Level 2 Inputs [Member] | Mortgage Banking [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		159	50
Derivative instruments, liabilities		14	2
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans	[1]	58,009	37,516
Long-lived assets held for sale		$ 629	$ 629

[1] Comprised of collateral dependent loans.