Investment Securities - Income Earned on Securities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Non-taxable:
Total	$ 206,918	$ 158,203	$ 111,693
Held-to-Maturity Securities1
Taxable:
Taxable	44,093	33,778	4,208
Non-taxable:
Non-taxable	40,612	36,516	16,047
Available-for-Sale Securities1
Taxable:
Taxable	99,085	60,659	54,768
Non-taxable:
Non-taxable	$ 23,128	$ 27,250	$ 36,670