Other income and operating expenses (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other income
Origination income	$ 1,213	$ 858	$ 3,729	$ 3,459
Release of repair and denial reserve	573	167	221	161
Other	1,193	179	2,721	744
Total other income	2,979	1,204	6,671	4,364
Other operating expenses
Origination costs	3,042	1,714	6,964	6,142
Technology expense	1,155	908	3,313	2,473
Charge off of real estate acquired in settlement of loans	144	236	824	1,236
Rent expense	968		2,762
Rent expense		720		1,804
Recruiting, training and travel expenses	366	419	1,252	1,698
Loan acquisition costs	359	196	464	1,377
Other	2,110	2,355	7,512	8,745
Total other operating expenses	$ 8,144	$ 6,548	$ 23,091	$ 23,475