Goodwill and Other Intangible Assets, Summary of Core Deposit and Other Intangibles (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Summary of core deposit intangibles and other intangibles
Other intangible amortization	$ 2,203	$ 2,203
Core Deposit Intangibles
Summary of core deposit intangibles and other intangibles
Gross carrying amount at the beginning of period			$ 88,109	$ 88,109
Accumulated amortization	(49,841)		(47,638)
Finite-Lived Intangible Assets, Net, Total	38,268		40,471
Other intangible amortization	$ 2,203		$ 8,811