CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income	$ 60,210	$ 53,022
Adjustments to reconcile net income to net cash provided by operating activities:
Accretion and amortization on securities, net	(104)	49
Net accretion of discounts on loans and leases	(2,137)	(1,492)
Amortization of borrowing costs	139	52
Amortization of operating lease right of use asset	2,346	2,655
Stock-based compensation expense	3,981	4,415
Trading activity	42	(318)
Provision for credit losses	4,000	11,800
Deferred income taxes	1,453	(4,264)
Origination of loans held for sale	(209,967)	(440,804)
Unrealized (gain) loss on loans held for sale	(22)	(1,303)
Gain on sales of loans held for sale	(5,270)	(19,901)
Proceeds from sale of loans held for sale	211,674	424,987
Amortization and change in fair value of mortgage servicing rights	1,185	1,795
(Gain) loss on sale of other real estate and foreclosed assets	(33)	(128)
Depreciation and amortization	5,728	6,186
Net changes in assets and liabilities which provide (use) cash:
Securities borrowed	161,806	(41,102)
Customer, broker-dealer and clearing receivables	(53,677)	(62,859)
Other assets	(118,876)	52,570
Securities loaned	(189,483)	60,031
Customer, broker-dealer and clearing payables	(25,385)	21,814
Accounts payable and other liabilities	18,949	(914)
Net cash provided by operating activities	(133,441)	66,291
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of investment securities	(7,033)	(22,071)
Proceeds from sales of securities	75,022	0
Proceeds from repayment of securities	57,756	24,984
Purchase of stock of regulatory agencies	(8,219)	0
Proceeds from redemption of stock of regulatory agencies	8,219	0
Origination of loans held for investment	(2,050,587)	(1,081,681)
Proceeds from sale of loans held for investment	12,100	9,220
Mortgage warehouse loans activity, net	(41,692)	(249,131)
Proceeds from sales of other real estate owned and repossessed assets	621	487
Acquisition of business activity, net of cash paid	(54,597)	0
Purchases of loans and leases, net of discounts and premiums	(7,481)	0
Principal repayments on loans	1,620,886	1,003,843
Purchases of furniture, equipment, software and intangibles	(3,943)	(1,754)
Net cash used in investing activities	(398,948)	(316,103)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net increase in deposits	931,645	(781,036)
Payments of the Federal Home Loan Bank term advances	(10,000)	0
Net (repayment) proceeds of Federal Home Loan Bank other advances	(186,000)	0
Net proceeds (repayments) of other borrowings	34,400	45,600
Tax payments related to settlement of restricted stock units	(5,999)	(2,693)
Repurchase of treasury stock	0	(12,742)
Cash dividends paid on preferred stock	0	(77)
Payment of debt issuance costs	0	(2,598)
Proceeds from issuance of subordinated notes	0	175,000
Net cash provided by financing activities	764,046	(578,546)
NET CHANGE IN CASH AND CASH EQUIVALENTS	231,657	(828,358)
CASH AND CASH EQUIVALENTS—Beginning of year	1,037,777	1,950,519
CASH AND CASH EQUIVALENTS—End of period	1,269,434	1,122,161
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid on deposits and borrowed funds	14,989	22,316
Income taxes paid	29,955	16,318
Transfers to other real estate and repossessed vehicles	140	350
Transfers from loans held for investment to loans held for sale	12,100	2,189
Transfers from loans held for sale to loans held for investment	376	27,379
Operating lease liabilities for obtaining right of use assets	7,842	0
Impact of adoption of ASU No. 2016-13 on retained earnings	$ 0	$ 37,088
Accounting Standards Update [Extensible List]	Accounting Standards Update 2016-13 [Member]	Accounting Standards Update 2016-04 [Member]