Accumulated Other Comprehensive Income - Amount Reclassified from AOCI (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Amount Reclassified from AOCI
Gain on sales of securities			$ 277
Interest income on taxable securities	$ 20,666	$ 8,678	11,637
Income tax expense	(27,811)	(18,170)	(13,769)
Net income	66,555	47,700	35,299
Unrealized Gains (Losses) on Available-for-Sale Securities and I/O Strips | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Gain on sales of securities			277
Income tax expense			(82)
Net income			195
Amortization of unrealized gain on securities available-for-sale that were reclassified to securities held-to-maturity
Amount Reclassified from AOCI
Net of tax		261
Amortization of unrealized gain on securities available-for-sale that were reclassified to securities held-to-maturity | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Interest income on taxable securities		371	52
Income tax expense		(110)	(15)
Net income		261	37
Defined Benefit Pension Plan Items
Amount Reclassified from AOCI
Net of tax	(292)	(450)
Defined Benefit Pension Plan Items | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	(414)	(639)	(327)
Income tax benefit	122	189	97
Net of tax	(292)	(450)	(230)
Prior transition obligation | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	41	4	60
Prior service cost | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Other noninterest expense	(455)	(643)	(387)
Accumulated Other Comprehensive Loss
Amount Reclassified from AOCI
Net of tax	(292)	(189)
Accumulated Other Comprehensive Loss | Amount Reclassified from AOCI
Amount Reclassified from AOCI
Net of tax	$ (292)	$ (189)	$ 2