Fair Value Measurements - Carrying Values and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
ASSETS
Securities available for sale	$ 970,391	$ 1,002,778
Portfolio loans, net	7,545,375	7,082,629
Derivative financial assets	63,018	83,456
LIABILITIES
Junior subordinated debt securities	49,358	54,453	$ 54,393
Derivative financial liabilities	78,293	104,817
Carrying Value
ASSETS
Cash and due from banks, including interest-bearing deposits	233,612	210,009
Securities available for sale	970,391	1,002,778
Loans held for sale	153	16
Portfolio loans, net	7,545,375	7,082,629
Collateral receivable	5,356	6,307
Securities held in a deferred compensation plan	9,399	8,087
Mortgage servicing rights	6,345	7,147
LIABILITIES
Deposits	7,521,769	7,219,970
Collateral payable	50,920	65,065
Short-term borrowings	415,000	370,000
Long-term borrowings	39,277	14,741
Junior subordinated debt securities	49,358	54,453
Carrying Value | Interest rate swaps - commercial loans
ASSETS
Derivative financial assets	63,018
LIABILITIES
Derivative financial liabilities	63,554	83,449
Carrying Value | Interest rate swaps - cash flow hedge
LIABILITIES
Derivative financial liabilities	14,739	21,368
Carrying Value | Interest Rate Swap [Member]
ASSETS
Derivative financial assets		83,449
Carrying Value | Interest rate lock commitments
ASSETS
Derivative financial assets		5
Carrying Value | Forward sale contracts
ASSETS
Derivative financial assets		2
Fair Value Measurements
ASSETS
Cash and due from banks, including interest-bearing deposits	233,612	210,009
Securities available for sale	970,391	1,002,778
Loans held for sale	153	16
Portfolio loans, net	7,263,270	6,815,167
Collateral receivable	5,356	6,307
Securities held in a deferred compensation plan	9,399	8,087
Mortgage servicing rights	8,704	9,994
LIABILITIES
Deposits	7,511,598	7,194,225
Collateral payable	50,920	65,065
Short-term borrowings	415,000	370,000
Long-term borrowings	38,995	14,174
Junior subordinated debt securities	49,358	54,453
Fair Value Measurements | Interest rate swaps - commercial loans
ASSETS
Derivative financial assets	63,018
LIABILITIES
Derivative financial liabilities	63,554	83,449
Fair Value Measurements | Interest rate swaps - cash flow hedge
LIABILITIES
Derivative financial liabilities	14,739	21,368
Fair Value Measurements | Interest Rate Swap [Member]
ASSETS
Derivative financial assets		83,449
Fair Value Measurements | Interest rate lock commitments
ASSETS
Derivative financial assets		5
Fair Value Measurements | Forward sale contracts
ASSETS
Derivative financial assets		2
Fair Value Measurements | Level 1
ASSETS
Cash and due from banks, including interest-bearing deposits	233,612	210,009
Securities available for sale	134,796	132,647
Loans held for sale	0	0
Portfolio loans, net	0	0
Collateral receivable	5,356	6,307
Securities held in a deferred compensation plan	9,399	8,087
Mortgage servicing rights	0	0
LIABILITIES
Deposits	5,940,117	6,285,377
Collateral payable	50,920	65,065
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated debt securities	0	0
Fair Value Measurements | Level 1 | Interest rate swaps - commercial loans
ASSETS
Derivative financial assets	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 1 | Interest rate swaps - cash flow hedge
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 1 | Interest Rate Swap [Member]
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 1 | Interest rate lock commitments
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 1 | Forward sale contracts
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 2
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities available for sale	835,595	870,131
Loans held for sale	153	16
Portfolio loans, net	0	0
Collateral receivable	0	0
Securities held in a deferred compensation plan	0	0
Mortgage servicing rights	0	0
LIABILITIES
Deposits	1,571,481	908,848
Collateral payable	0	0
Short-term borrowings	415,000	370,000
Long-term borrowings	38,995	14,174
Junior subordinated debt securities	49,358	54,453
Fair Value Measurements | Level 2 | Interest rate swaps - commercial loans
ASSETS
Derivative financial assets	63,018
LIABILITIES
Derivative financial liabilities	63,554	83,449
Fair Value Measurements | Level 2 | Interest rate swaps - cash flow hedge
LIABILITIES
Derivative financial liabilities	14,739	21,368
Fair Value Measurements | Level 2 | Interest Rate Swap [Member]
ASSETS
Derivative financial assets		83,449
Fair Value Measurements | Level 2 | Interest rate lock commitments
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 2 | Forward sale contracts
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities available for sale	0	0
Loans held for sale	0	0
Portfolio loans, net	7,263,270	6,815,167
Collateral receivable	0	0
Securities held in a deferred compensation plan	0	0
Mortgage servicing rights	8,704	9,994
LIABILITIES
Deposits	0	0
Collateral payable	0	0
Short-term borrowings	0	0
Long-term borrowings	0	0
Junior subordinated debt securities	0	0
Fair Value Measurements | Level 3 | Interest rate swaps - commercial loans
ASSETS
Derivative financial assets	0
LIABILITIES
Derivative financial liabilities	0	0
Fair Value Measurements | Level 3 | Interest rate swaps - cash flow hedge
LIABILITIES
Derivative financial liabilities	$ 0	0
Fair Value Measurements | Level 3 | Interest Rate Swap [Member]
ASSETS
Derivative financial assets		0
Fair Value Measurements | Level 3 | Interest rate lock commitments
ASSETS
Derivative financial assets		5
Fair Value Measurements | Level 3 | Forward sale contracts
ASSETS
Derivative financial assets		$ 2