CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities:
Net income	$ 110,512	$ 109,511	$ 84,369
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses - loans	(508)	10,547	26
Provision for credit losses - securities AFS	1,040	3,154	7,245
Stock-based compensation expense	3,467	2,756	2,075
Depreciation and amortization	4,036	3,318	3,205
Deferred tax expense (benefit)	487	(1,579)	(1,579)
Amortization of premium on securities	2,312	1,099	309
Amortization of core deposit intangible	1,913	1,579	1,895
Amortization of mortgage servicing rights - net	2,759	1,947	1,535
Amortization of premiums on purchased loans - net			8,384
Gain on sale of loans		(21,459)	(15,140)
Amortization of OCI - securities transfer to HTM	(377)
Valuation allowance on mortgage servicing rights - net	(1,874)	1,899	1,424
Increase in other assets	(38,999)	(39,173)	(38,899)
Increase in accounts payable and other liabilities	16,286	23,336	12,593
Net cash provided by operating activities	101,054	96,935	67,442
Cash Flows from Investing Activities:
Net increase in loans	(3,318,750)	(1,623,291)	(794,305)
Proceeds from sale of loans		580,417	553,148
Purchase of premises and equipment	(4,583)	(3,207)	(2,862)
Disposals of premises and equipment	3,388
Recovery of allowance for credit losses	436	999	1,003
Purchases of securities AFS	(798)	(454,788)	(56,629)
Purchases of securities HTM	(171,852)
Proceeds from sale of securities		3,500
Maturities of securities AFS	27,923	268,146	270,480
Maturities of securities HTM	224,737
Cash in from merger		1,145,340
Sale (purchase) of FHLB and FRB stock, net	(7,109)	3,511	4,269
Proceeds from BOLI policy	326
Net cash (used in) investing activities	(3,246,282)	(79,373)	(24,896)
Cash Flows from Financing Activities:
Increase in deposits	1,550,650	727,539	1,022,289
Net increase (decrease) in FHLB & other advances	1,005,000	(255,000)	(478,000)
Line of credit net change - borrowings, net	1,500	17,085	4,000
Net increase in subordinated debt	147,639
Net increase in repurchase agreements	5,672
Gain on sale leaseback	(1,061)
Dividends paid	(24,830)	(16,173)	(12,504)
Settlement of swap			(12,102)
Proceeds from exercise of stock options	18	2,759	915
Repurchase of stock	(4,623)	(1,722)	(2,824)
Net cash provided by financing activities	2,679,965	474,488	521,774
Increase (decrease) in cash and cash equivalents	(465,263)	492,050	564,320
Cash and cash equivalents at beginning of year	1,121,757	629,707	65,387
Cash and cash equivalents at end of period	656,494	1,121,757	629,707
Supplemental disclosures of cash flow information:
Income taxes	41,014	39,510	31,310
Interest	75,674	15,272	56,991
Noncash transactions:
Transfer of loans to loans held for sale		592,898	561,502
Transfer of loans to loans held for investment	485,281
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
Transfer of loans to REO		6,210
Chargeoffs against allowance for credit losses	$ 720	1,824	1,844
Mortgage servicing rights from loan sales		2,726	$ 3,853
Acquisition:
Assets acquired, net of cash received		1,489,698
Liabilities assumed		2,357,600
Cash considerations		10
Stock consideration		283,011
Goodwill		$ 125,128