Goodwill and Intangibles - Acquisitions, Goodwill (Details) - USD ($)					12 Months Ended
	Dec. 31, 2018	Oct. 01, 2018	Jan. 02, 2018	Aug. 15, 2017	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Goodwill
Goodwill acquired during the period
Post-acquisition adjustments
Finite-Lived Intangible Assets, Net					1,186,000	1,707,000	2,283,000
Multifamily
Goodwill
Goodwill acquired during the period
Post-acquisition adjustments
Banking
Goodwill
Goodwill acquired during the period
Post-acquisition adjustments
Mortgage Warehousing
Goodwill
Goodwill acquired during the period
Post-acquisition adjustments
NattyMac, LLC
Goodwill
Post-acquisition adjustments								$ 271,000
Transfer to intangible assets	$ 1,600,000							$ 1,600,000
NattyMac, LLC | Mortgage Warehousing
Goodwill
Goodwill acquired during the period	$ 3,700,000
FMNBP | Banking
Goodwill
Goodwill acquired during the period		$ 6,900,000
Post-acquisition adjustments		$ 333,000
FMBI | Banking
Goodwill
Goodwill acquired during the period			$ 988,000
MCS | Multifamily
Goodwill
Goodwill acquired during the period				$ 3,800,000
Post-acquisition adjustments									$ 412,000