CONSOLIDATED STATEMENTS OF CASH FLOWS - UNAUDITED - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Cash Flows from Operating Activities:
Net income			$ 93,158	$ 85,635
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses - loans			(1,761)	(2,865)
Provision for credit losses - securities AFS	$ 293	$ 1,000	1,120	2,853	$ 3,154
Stock-based compensation expense			2,770	2,202
Depreciation and amortization			3,056	2,477
Deferred tax expense (benefit)			944	(445)
Amortization of premium on securities			2,392	750
Amortization of core deposit intangible			1,458	1,213
Amortization of mortgage servicing rights - net			1,566	1,370
Gain on sale of loans		(18,135)		(21,459)
Amortization of OCI - securities transfer to HTM			(851)
Valuation allowance on mortgage servicing rights - net			(747)	2,134
Increase in other assets			(32,636)	(34,876)
Increase in accounts payable and other liabilities			29,772	31,151
Net cash provided by operating activities			100,241	70,140
Cash Flows from Investing Activities:
Net increase in loans			(2,947,628)	(1,063,500)
Proceeds from sale of loans				580,417
Purchase of premises and equipment			(4,007)	(2,556)
Disposals of premises and equipment			3,388
Recovery of allowance for credit losses			355	864
Purchases of securities AFS			(398)	(306,267)
Purchases of securities HTM			(171,852)
Proceeds from sale of securities				3,500
Maturities of securities AFS			24,775	207,423
Maturities of securities HTM			202,899
Net increase in FHLB stock			(12,954)
Proceeds from BOLI policy			326
Net cash used in investing activities			(2,905,096)	(580,119)
Cash Flows from Financing Activities:
Increase in deposits			737,896	931,545
Net increase (decrease) in FHLB advances			1,144,000	(255,000)
Line of credit net change - borrowings, net			(18,500)	(1,500)
Net increase in subordinated debt			147,623
Net increase in repurchase agreements			13,206
Gain on sale leaseback			(1,123)
Dividends paid			(18,627)	(12,089)
Proceeds from exercise of stock options			18	1,880
Repurchase of stock			(3,577)	(1,188)
Net cash provided by financing activities			2,000,916	663,648
Increase (decrease) in cash and cash equivalents			(803,939)	153,669
Cash and cash equivalents at beginning of year			1,121,757	629,707	629,707
Cash and cash equivalents at end of period	$ 317,818	$ 783,376	317,818	783,376	$ 1,121,757
Supplemental disclosures of cash flow information:
Income taxes			31,016	27,683
Interest			32,078	12,873
Noncash transactions:
Transfer of loans to loans held for sale				555,085
Transfer of securities from available-for-sale to held-to-maturity			916,777
Goodwill acquisition adjustment			1,623
Right of use lease assets and liabilities recognized			$ 21,649
Mortgage servicing rights from loan sales				$ 2,726