Fair Value Measurements (Carrying Amount, Estimated Fair Value, and Placement in Fair Value Hierarchy of Financial Instruments) (Details) - USD ($) $ in Thousands		Mar. 31, 2024	Dec. 31, 2023
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		$ 923,761	$ 887,730
Securities held to maturity, fair value		131,269	137,030
Accrued interest receivable		24,914	24,481
FHLB and FRB stock		15,042	17,406
Carrying Amount [Member] | Level 1 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash and cash equivalents		237,038	124,442
Accrued interest receivable		24,914	24,481
Non-maturity deposits		3,836,171	3,808,216
Short-term borrowings		133,000	185,000
Accrued interest payable		27,224	19,412
Carrying Amount [Member] | Level 2 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		923,761	887,730
Securities held to maturity, fair value		143,714	148,156
Loans held for sale		504	1,370
Loans		4,368,217	4,373,541
FHLB and FRB stock		15,042	17,406
Time deposits		1,560,586	1,404,696
Long-term borrowings		124,610	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		6,835	5,939
Carrying Amount [Member] | Level 2 Inputs [Member] | Interest Rate Products [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Derivative instruments, assets		44,173	37,517
Derivative instruments, liabilities		44,175	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		221	50
Derivative instruments, liabilities		5	2
Carrying Amount [Member] | Level 3 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans	[1]	30,754	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		237,038	124,442
Accrued interest receivable		24,914	24,481
Non-maturity deposits		3,836,171	3,808,216
Short-term borrowings		133,000	185,000
Accrued interest payable		27,224	19,412
Estimated Fair Value [Member] | Level 2 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Securities available for sale		923,761	887,730
Securities held to maturity, fair value		131,269	137,030
Loans held for sale		504	1,370
Loans		4,160,389	4,143,918
FHLB and FRB stock		15,042	17,406
Time deposits		1,553,489	1,398,352
Long-term borrowings		127,022	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		6,835	5,939
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		44,173	37,517
Derivative instruments, liabilities		44,175	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		221	50
Derivative instruments, liabilities		5	2
Estimated Fair Value [Member] | Level 3 Inputs [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Loans	[1]	30,754	37,516
Long-lived assets held for sale		$ 629	$ 629

[1] Comprised of collateral dependent loans.