Fair Value Measurements - Carrying Values and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ASSETS
Securities	$ 1,002,778	$ 910,793
Loans held for sale	16	1,522
Portfolio loans, net	7,082,629	6,901,414
Derivative financial assets	83,456	33,933
LIABILITIES
Junior subordinated debt securities	54,453	54,393	$ 64,083
Derivative financial liabilities	104,817	33,631
Derivatives Not Designated as Hedging Instruments
ASSETS
Derivative financial assets	83,456	33,933
LIABILITIES
Derivative financial liabilities	83,449	33,631
Derivatives Designated as Hedging Instruments
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities	21,368	0
Carrying Value
ASSETS
Cash and due from banks, including interest-bearing deposits	210,009	922,215
Securities	1,002,778	910,793
Loans held for sale	16	1,522
Portfolio loans, net	7,082,629	6,901,414
Collateral receivable	6,307	37,363
Securities held in a deferred compensation plan	8,087	10,230
Mortgage servicing rights	7,147	7,677
LIABILITIES
Deposits	7,219,970	7,996,524
Collateral payable	65,065
Securities sold under repurchase agreements		84,491
Short-term borrowings	370,000
Long-term borrowings	14,741	22,430
Junior subordinated debt securities	54,453	54,393
Carrying Value | Interest rate swaps
ASSETS
Derivative financial assets	83,449	33,528
LIABILITIES
Derivative financial liabilities		33,631
Carrying Value | Interest rate swaps | Derivatives Not Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	83,449
Carrying Value | Interest rate swaps | Derivatives Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	21,368
Carrying Value | Interest rate lock commitments
ASSETS
Derivative financial assets	5	401
Carrying Value | Forward sale contracts
ASSETS
Derivative financial assets	2	4
Fair Value Measurements
ASSETS
Cash and due from banks, including interest-bearing deposits	210,009	922,215
Securities	1,002,778	910,793
Loans held for sale	16	1,522
Portfolio loans, net	6,815,167	6,815,468
Collateral receivable		37,363
Securities held in a deferred compensation plan	8,087	10,230
Mortgage servicing rights	9,994	7,677
LIABILITIES
Deposits	7,194,225	7,992,942
Collateral payable	65,065
Securities sold under repurchase agreements		84,491
Short-term borrowings	370,000
Long-term borrowings	14,174	22,678
Junior subordinated debt securities	54,453	54,393
Fair Value Measurements | Interest rate swaps
ASSETS
Derivative financial assets	83,449	33,528
LIABILITIES
Derivative financial liabilities		33,631
Fair Value Measurements | Interest rate swaps | Derivatives Not Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	83,449
Fair Value Measurements | Interest rate swaps | Derivatives Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	21,368
Fair Value Measurements | Interest rate lock commitments
ASSETS
Derivative financial assets	5	401
Fair Value Measurements | Forward sale contracts
ASSETS
Derivative financial assets	2	4
Fair Value Measurements | Level 1
ASSETS
Cash and due from banks, including interest-bearing deposits	210,009	922,215
Securities	132,647	96,388
Loans held for sale	0	0
Portfolio loans, net	0	0
Collateral receivable		37,363
Securities held in a deferred compensation plan	8,087	10,230
Mortgage servicing rights	0	0
LIABILITIES
Deposits	6,285,377	6,908,453
Collateral payable	65,065
Securities sold under repurchase agreements		84,491
Short-term borrowings	0
Long-term borrowings	0	0
Junior subordinated debt securities	0	0
Fair Value Measurements | Level 1 | Interest rate swaps
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities		0
Fair Value Measurements | Level 1 | Interest rate swaps | Derivatives Not Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	0
Fair Value Measurements | Level 1 | Interest rate swaps | Derivatives Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	0
Fair Value Measurements | Level 1 | Interest rate lock commitments
ASSETS
Derivative financial assets	0	0
Fair Value Measurements | Level 1 | Forward sale contracts
ASSETS
Derivative financial assets	0	0
Fair Value Measurements | Level 2
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities	870,131	814,405
Loans held for sale	16	1,522
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	908,848	1,084,489
Collateral payable	0
Securities sold under repurchase agreements		0
Short-term borrowings	370,000
Long-term borrowings	14,174	22,678
Junior subordinated debt securities	54,453	54,393
Fair Value Measurements | Level 2 | Interest rate swaps
ASSETS
Derivative financial assets	83,449	33,528
LIABILITIES
Derivative financial liabilities		33,631
Fair Value Measurements | Level 2 | Interest rate swaps | Derivatives Not Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	83,449
Fair Value Measurements | Level 2 | Interest rate swaps | Derivatives Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	21,368
Fair Value Measurements | Level 2 | Interest rate lock commitments
ASSETS
Derivative financial assets	0	0
Fair Value Measurements | Level 2 | Forward sale contracts
ASSETS
Derivative financial assets	0	0
Fair Value Measurements | Level 3
ASSETS
Cash and due from banks, including interest-bearing deposits	0	0
Securities	0	0
Loans held for sale	0	0
Portfolio loans, net	6,815,167	6,815,468
Collateral receivable	0	0
Securities held in a deferred compensation plan	0	0
Mortgage servicing rights	9,994	7,677
LIABILITIES
Deposits	0	0
Collateral payable	0
Securities sold under repurchase agreements		0
Short-term borrowings	0
Long-term borrowings	0	0
Junior subordinated debt securities	0	0
Fair Value Measurements | Level 3 | Interest rate swaps
ASSETS
Derivative financial assets	0	0
LIABILITIES
Derivative financial liabilities		0
Fair Value Measurements | Level 3 | Interest rate swaps | Derivatives Not Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	0
Fair Value Measurements | Level 3 | Interest rate swaps | Derivatives Designated as Hedging Instruments
LIABILITIES
Derivative financial liabilities	0
Fair Value Measurements | Level 3 | Interest rate lock commitments
ASSETS
Derivative financial assets	5	401
Fair Value Measurements | Level 3 | Forward sale contracts
ASSETS
Derivative financial assets	$ 2	$ 4