Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022	Mar. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Mortgage servicing rights	$ 73,424	$ 74,097	$ 60,481	$ 47,392
Fair Value, Recurring
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	532,650	536,973
Loans held-for-sale	66,255	57,323
Mortgage servicing rights	73,424	74,097
Derivative financial instruments - assets	33,651	40,287
Derivative financial instruments - liabilities	(20,836)	(24,527)
Total	685,144	684,153
Fair Value, Recurring | Fair Value, Inputs, Level 1
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	57,369	56,649
Loans held-for-sale	0	0
Mortgage servicing rights	0	0
Derivative financial instruments - assets	0	0
Derivative financial instruments - liabilities	0	0
Total	57,369	56,649
Fair Value, Recurring | Fair Value, Inputs, Level 2
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	475,281	480,324
Loans held-for-sale	66,255	57,323
Mortgage servicing rights	0	0
Derivative financial instruments - assets	33,651	40,287
Derivative financial instruments - liabilities	(20,836)	(24,527)
Total	554,351	553,407
Fair Value, Recurring | Fair Value, Inputs, Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Available-for-sale securities	0	0
Loans held-for-sale	0	0
Mortgage servicing rights	73,424	74,097
Derivative financial instruments - assets	0	0
Derivative financial instruments - liabilities	0	0
Total	$ 73,424	$ 74,097