Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 16,320	$ 4,670
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation, amortization and accretion, net	14,616	9,561
Stock compensation	4,280	3,243
Provision (recovery):
Loan and lease losses	9,099	1,068
Deferred taxes	(6,787)	6,807
Loans held for sale:
Originations	(7,469)	0
Proceeds from sales	22,611	0
Net change	6,571	0
Fair value adjustment of foreclosed real estate	0	23
Net realized (gain) loss:
Other assets	24	8
Foreclosed real estate or other assets	(15)	19
Available for sale securities, net	22	1,010
Loans held for sale	(550)	0
Leases receivable and rental equipment	(677)	0
Net change:
Other assets	(18,004)	(1,102)
Accrued interest payable	3,486	1,785
Accrued expenses and other liabilities	9,454	(14,462)
Accrued interest receivable	(60)	(1,709)
Change in bank-owned life insurance value	(641)	(669)
Net cash provided by operating activities	52,232	10,236
Available for sale securities:
Purchases	(51,430)	(105,327)
Proceeds from sales	171,927	65,941
Proceeds from maturities and principal repayments	34,557	35,065
Held to maturity:
Proceeds from maturities and principal repayments	10,423	12,021
Loans and leases:
Purchases	(122,668)	(75,163)
Proceeds from Sales	378	5,916
Net change	(299,400)	(114,827)
Proceeds from sales of foreclosed real estate or other assets	105	122
Federal Home Loan Bank stock:
Purchases	(235,000)	(249,920)
Redemption	242,800	253,600
Rental Equipment:
Purchases	(46,153)	0
Proceeds from Sales	1,466	0
Net change	(611)
Premises and equipment:
Purchases	(5,729)	(2,593)
Proceeds from Sales	19	0
Net cash (used in) investing activities	(299,316)	(175,165)
Cash flows from financing activities:
Checking, savings, and money market deposits	353,642	341,407
Time deposits	(105,632)	4,583
Wholesale deposits	259,430	(55,769)
FHLB and other borrowings	0	(205,000)
Federal funds	(195,000)	113,000
Securities sold under agreements to repurchase	532	867
Net investment by (distribution to) noncontrolling interests	(1,229)	0
Other liabilities	(2,847)	0
Capital lease obligations	(16)	(16)
Cash dividends paid	(1,970)	(1,256)
Purchase of shares by ESOP	2,010	1,606
Issuance of restricted stock	2	1
Proceeds from exercise of stock options & issuance of common stock	54	0
Shares repurchased for tax withholdings on stock compensation	(2,367)	(1,671)
Net cash provided by financing activities	311,636	197,752
Effect of exchange rate changes on cash	(360)	0
Net change in cash and cash equivalents	64,192	32,823
Cash and cash equivalents at beginning of year	99,977	1,267,586
Cash and cash equivalents at end of year	164,169	1,300,409
Supplemental disclosure of cash flow information
Interest	18,190	6,446
Income taxes	595	218
Franchise taxes	0	31
Other taxes	49	1
Supplemental schedule of non-cash investing activities:
Loans transferred to held for sale	(39,452)	0
Securities transferred from held-to-maturity to available-for-sale	$ 0	$ (306,000)