Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Interest Income
Loans	$ 713	$ 595	$ 446
Investment securities	77	86	80
Interest-earning deposits and other	4	2	1
Total interest income	794	683	527
Interest Expense
Deposits	138	94	52
Short-term Federal Home Loan Bank advances and other	59	68	36
Long-term Federal Home Loan Bank advances	7	(4)	24
Other long-term debt	28	28	25
Total interest expense	232	186	137
Net interest income	562	497	390
Provision (benefit) for loan losses	18	(8)	6
Net interest income after provision (benefit) for loan losses	544	505	384
Noninterest Income
Net gain on loan sales	335	200	268
Loan fees and charges	100	87	82
Net return on mortgage servicing rights	6	36	22
Loan administration income	30	23	21
Deposit fees and charges	38	21	18
Other noninterest income	101	72	59
Total noninterest income	610	439	470
Noninterest Expense
Compensation and benefits	377	318	299
Occupancy and equipment	161	127	103
Commissions	111	80	72
Loan processing expense	80	59	57
Legal and professional expense	27	28	30
Federal insurance premiums	20	22	16
Intangible asset amortization	15	5	0
Other noninterest expense	97	73	66
Total noninterest expense	888	712	643
Income before income taxes	266	232	211
Provision for income taxes	48	45	148
Net income	$ 218	$ 187	$ 63
Net income per share
Basic (in usd per share)	$ 3.85	$ 3.26	$ 1.11
Diluted (in usd per share)	$ 3.80	$ 3.21	$ 1.09
Weighted average shares outstanding
Basic (in shares)	56,584,238	57,520,289	57,093,868
Diluted (in shares)	57,238,978	58,322,950	58,178,343