Acquisition of a Business - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands				3 Months Ended		6 Months Ended
	Jul. 01, 2023	Jun. 30, 2023	Mar. 31, 2023	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Common stock, voting par value				$ 0.01			$ 0.01
Goodwill			$ 148,353	$ 181,705	$ 148,353		$ 181,705	$ 148,353
Salaries and employee benefits				33,953	30,394
Other non-interest expense				$ 5,776	$ 4,730
Inland Bancorp, Inc.
Business Acquisition [Line Items]
Business acquisition date of agreement				Jul. 01, 2023
Right to receive common stock upon conversion	0.19
Common stock, voting par value	$ 0.01
Cash payment per share	$ 0.68
Consideration paid in cash	$ 21,200			$ 31,897
Common stock issued price per share	$ 18.09			$ 18.09
Issuance of common shares	5,932,323			5,932,323
Value of common stock consideration	$ 107,300
Options to acquire common stock shares	288,200
Option to acquire common stock value	$ 424,000
Total merger consideration	138,900			$ 138,914		$ 9,900
Stock issuance costs	299,000
Goodwill	$ 33,400			$ 33,352
Number of shares purchased		2,408,992	2,408,992
Business acquisition transaction completion Date					Jun. 30, 2023
Inland Bancorp, Inc. | Non-interest Expense
Business Acquisition [Line Items]
Core system conversion expenses					$ 199,000
Acquisition advisory expenses					256,000
Salaries and employee benefits					18,000
Other non-interest expense					$ 16,000