Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income before noncontrolling interest	$ 22,249	$ 16,320
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion, net	15,302	14,616
Stock compensation	3,506	4,280
Provision (recovery):
Provision for loan and lease losses	3,407	9,099
Deferred taxes	(16)	(6,787)
Loans held for sale:
Originations	(16,175)	(7,469)
Proceeds from sales	143,035	22,611
Net change	11,111	6,571
Fair value adjustment of foreclosed real estate	83	0
Net realized (gain) loss:
Other assets	108	(24)
Foreclosed real estate and repossessed assets	5,039	(15)
Securities available for sale, net	0	22
Loans held for sale	(1,851)	(550)
Leases receivable and equipment	(685)	(677)
Net change:
Other assets	(12,917)	(18,004)
Accrued interest payable	(2,794)	3,486
Accrued expenses and other liabilities	(33,892)	9,454
Accrued interest receivable	618	(60)
Change in bank-owned life insurance value	(631)	(641)
Net cash provided by operating activities	135,497	52,232
Securities available for sale:
Purchases	0	(51,430)
Proceeds from sales	0	171,927
Proceeds from maturities and principal repayments	52,592	34,557
Securities held to maturity:
Proceeds from maturities and principal repayments	11,062	10,423
Loans and leases:
Purchases	(18,813)	(122,668)
Proceeds from sales	3,099	378
Net change	(167,929)	(299,400)
Loss on sale	23,085	105
Federal Home Loan Bank stock:
Purchases	(244,240)	(235,000)
Redemption	261,360	242,800
Rental equipment:
Purchases	(17,956)	(46,153)
Proceeds from sales	2,250	1,466
Net change	3,124	(611)
Premises, furniture, and equipment:
Purchases	(2,108)	(5,729)
Proceeds from sales	0	19
Net cash (used in) investing activities	(94,474)	(299,316)
Cash flows from financing activities:
Checking, savings, and money market deposits	674,696	353,642
Time certificates of deposit	(86,683)	(105,632)
Wholesale deposits	(118,481)	259,430
FHLB and other borrowings	(20,000)	0
Federal funds	(428,000)	(195,000)
Securities sold under agreements to repurchase	(4,019)	532
Net investment by (distribution to) noncontrolling interests	(923)	(1,229)
Proceeds from other liabilities	1,205	5,027
Other liabilities	(2,194)	(2,847)
Capital lease obligations	(1,818)	(16)
Cash dividends paid	(1,870)	(1,970)
Issuance of common stock due to ESOP	3,220	2,010
Issuance of common stock due to restricted stock	2	2
Proceeds from exercise of stock options and issuance of common stock	118	54
Shares repurchased	(30,748)	(2,367)
Net cash (used in) provided by financing activities	(15,495)	311,636
Effect of exchange rate changes on cash	116	(360)
Net change in cash and cash equivalents	25,644	64,192
Cash and cash equivalents at beginning of fiscal year	126,545	99,977
Cash and cash equivalents at end of fiscal year	152,189	164,169
Supplemental disclosure of cash flow information
Interest	10,180	18,190
Income taxes	220	595
Franchise taxes	40	0
Other taxes	12	49
Supplemental schedule of non-cash investing activities
Transfers of loans and leases to foreclosed real estate and repossessed assets	41	0
Transfers of loans and leases to rental equipment	759	0
Transfers of rental equipment to loan and leases	599	0
Transfers of loans and leases to held for sale	251,913	39,452
Transfers of other assets to held for sale	7,836	0
Transfers of deposits to held for sale	286,648	0
Recognition of operating lease ROU assets, net of remeasurements	$ 27,019	$ 0