CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating activities
Net income/(loss)	$ (16,687)	$ 82,839
Adjustments to reconcile net income/(loss) to net cash provided by operating activities:
Provision for credit losses	96,000	20,000
Depreciation and amortization	13,122	7,792
Net (gain)/loss on sale of loans held for sale	13,000	505
Increase/(decrease) in valuation allowance on mortgage servicing rights	10,015	2,931
Stock-based compensation expense	3,369	4,488
Purchases and originations of loans held for sale	(2,356,710)	(1,550,059)
Proceeds from sales and repayments of loans held for sale	4,126,102	1,602,923
Changes in operating assets and liabilities:
Accrued interest receivable and other assets	(141,940)	(58,278)
Accrued interest payable and other liabilities	39,473	51,023
Net cash provided by operating activities	1,785,744	164,164
Investing activities
Purchases of investment securities	(1,951)	(109,928)
Principal payments received on investment securities	4,788	307
Originations of mortgage finance loans	(37,932,501)	(24,328,971)
Proceeds from pay-offs of mortgage finance loans	38,513,547	23,906,785
Net increase in loans held for investment, excluding mortgage finance loans	(438,869)	(375,628)
Purchase of premises and equipment, net	(1,007)	(2,642)
Proceeds from sale of other real estate owned, net	0	79
Net cash provided by/(used in) investing activities	144,007	(909,998)
Financing activities
Net increase in deposits	655,670	44,014
Costs from issuance of stock related to stock-based awards and warrants	(1,492)	(1,233)
Preferred dividends paid	(2,438)	(2,438)
Net increase/(decrease) in other borrowings	2,500,000
Net increase/(decrease) in other borrowings		(300,000)
Net increase/(decrease) in federal funds purchased and repurchase agreements	153,501	256,718
Net cash provided by/(used in) financing activities	3,305,241	(2,939)
Net increase/(decrease) in cash and cash equivalents	5,234,992	(748,773)
Cash and cash equivalents at beginning of period	4,425,583	3,080,065
Cash and cash equivalents at end of period	9,660,575	2,331,292
Supplemental disclosures of cash flow information:
Cash paid during the period for interest	73,480	86,134
Cash paid during the period for income taxes	$ 519	$ 6