Office Properties and Equipment, net - Schedule of Office Properties and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 154,434	$ 145,273
Less accumulated depreciation and amortization	(70,557)	(66,565)
Total office properties and equipment, net	83,877	78,708
Land
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	16,534	12,900
Buildings
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	39,097	36,897
Land and building improvements
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	40,501	36,683
Leasehold improvements
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	23,555	22,636
Furniture and equipment
Property, Plant and Equipment [Line Items]
Office property and equipment, gross	$ 34,747	$ 36,157