Other Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Other Income and Expenses [Abstract]
MSR (loss) income, net	$ (2,362)	$ 431	$ (5,595)	$ 2,342
Risk share income	1,200	905	3,146	2,351
FHLBC capital stock dividend	116	541	1,201	1,623
Equity investment income	341	560	615	732
5 Arches loan administration fee income	688	1,344	2,206	3,298
Gain on re-measurement of investment in 5 Arches	0	0	0	2,441
Other	(97)	575	2,406	1,053
Other income, net	$ (114)	$ 4,356	$ 3,979	$ 13,840