Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income	$ 77,329	$ 62,874	$ 54,684
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	852	461	296
Provision for loan losses	3,940	4,629	2,472
Deferred income tax, net	(978)	2,313	(2,415)
Gain on sale of securities	(476)
Gain on sale of loans	(35,411)	(39,266)	(37,790)
Proceeds from sales of loans	32,792,977	18,027,460	18,498,028
Loans and participations originated and purchased for sale	(34,025,666)	(17,832,035)	(18,702,694)
Change in mortgage servicing rights for paydowns and fair value adjustments	10,789	2,348	2,554
Net change in:
Trading securities	(106,472)	(22,582)	(3,162)
Other assets and receivables	(3,663)	(10,023)	11,501
Other liabilities	24,046	4,164	(850)
Other	5,730	3,992	1,490
Net cash provided by (used in) operating activities	(1,257,003)	204,335	(175,886)
Investing activities:
Net change in securities purchased under agreements to resell	152	168	(1,651)
Purchases of available-for-sale securities	(647,374)	(47,040)	(199,635)
Proceeds from the sale of available-for-sale securities	37,817	6,431	0
Proceeds from calls, maturities and paydowns of available-for-sale securities	651,798	188,252	116,506
Purchases of loans	(87,302)	(138,965)	(133,329)
Net change in loans receivable	(885,150)	(484,102)	(300,889)
Purchase of Federal Home Loan Bank stock	(15,875)	(956)
Proceeds from sale of Federal Home Loan Bank stock	3,481	700
Proceeds from sale of assets		10
Purchases of premises and equipment	(13,983)	(9,195)	(788)
Purchases of mortgage servicing rights		(6,313)	(1,209)
Purchase of limited partnership interests	(1,365)	(3,810)	(2,694)
Cash (paid) received in acquisition of subsidiary		(14,320)	363
Other investing activities	126	74	189
Net cash used in investing activities	(957,675)	(509,066)	(523,137)
Financing activities:
Net change in deposits	2,247,064	155,002	514,940
Proceeds from Federal Home Loan Bank borrowings	8,917,286	1,089,107	754,150
Repayment of Federal Home Loan Bank borrowings	(8,907,917)	(931,994)	(754,544)
Payments of contingent consideration	(1,999)	(745)
Proceeds from issuance of common stock			106,245
Proceeds from issuance of preferred stock	192,915
Repurchase of preferred stock	(21,850)
Proceeds from notes payable	6,318	19,116
Payments on notes payable	(29,700)	(38,534)
Dividends	(17,254)	(10,216)	(7,950)
Net cash provided by financing activities	2,384,863	281,736	612,841
Net Change in Cash and Cash Equivalents	170,185	(22,995)	(86,182)
Cash and Cash Equivalents, Beginning of Period	336,524	359,519	445,701
Cash and Cash Equivalents, End of Period	506,709	336,524	359,519
Additional Cash Flows Information:
Interest paid	81,892	49,276	26,763
Income taxes paid	$ 19,326	16,965	27,050
The Company purchased all of the capital stock of FMBI on January 2, 2018, the capital stock of FMNBP on October 1, 2018, and the assets of NattyMac, LLC on December 31, 2018. The Company also purchased all of the capital stock for MCS on August 15, 2017. In conjunction with the acquisitions, liabilities were assumed as follows:
Fair value of assets acquired		168,153	12,666
Cash paid for the capital stock/fair value common stock issued		29,872	8,127
Fair value of liabilities assumed		$ 138,281	$ 4,539