Other Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Other Income and Expenses [Abstract]
MSR (loss) income, net	$ (9,694)	$ 3,521	$ 7,076
Risk share income	4,367	3,522	3,613
FHLBC capital stock dividend	1,229	2,169	1,763
Equity investment income	1,037	1,405	618
5 Arches loan administration fee income	2,912	4,400	0
Gain on re-measurement of investment in 5 Arches	0	2,441	0
Other	4,337	1,799	0
Other Income	$ 4,188	$ 19,257	$ 13,070