CONSOLIDATED STATEMENT 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	$ 106,507	$ 124,403	$ 77,764
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	6,115	5,482	6,020
Amortization of premiums and discounts on securities, net	576	6,220	5,019
Amortization of operating lease right-of-use assets	6,485	4,576	4,362
Other amortization and accretion, net	(1,967)	(13,908)	(8,667)
Stock based compensation	11,155	8,685	7,304
Origination of loans designated for sale	(186,504)	(490,426)	(511,706)
Sale of loans designated for sale	221,199	543,410	477,178
Provision for credit losses	26,183	(9,421)	38,179
Deferred income taxes	(10,398)	3,836	(4,926)
Losses (gains) on sale of securities	0	363	(1,096)
Gains on sale of loans	(5,687)	(15,276)	(13,930)
(Gains) losses on sale and write-downs of other real estate owned	(1,749)	(635)	1,139
Losses on disposition of fixed assets	1,394	817	791
Changes in operating assets and liabilities, net of effects from acquired companies:
Net decrease (increase) in other assets	508	(42,437)	(35,555)
Net increase in other liabilities	22,042	28,883	18,776
Net Cash Provided by Operating Activities	195,859	154,572	60,652
Cash Flows From Investing Activities
Maturities and repayments of available-for-sale debt securities	270,785	546,339	304,064
Maturities and repayments of held-to-maturity debt securities	96,925	132,916	75,861
Proceeds from sale of available-for-sale debt securities	515,183	84,972	96,732
Purchases of available-for-sale debt securities	(693,625)	(1,145,193)	(830,300)
Purchases of held-to-maturity debt securities	(206,065)	(377,159)	0
Maturities of time deposits with other banks	3,237	750	2,992
Net new loans and principal repayments	(513,343)	566,348	(79,100)
Purchases of loans held for investment	(111,292)	(259,267)	0
Proceeds from the sale of other real estate owned	15,951	5,598	8,521
Additions to other real estate owned	(591)	(2,513)	(2,557)
Proceeds from sale of FHLB and Federal Reserve Bank Stock	0	3,945	39,185
Purchase of FHLB and Federal Reserve Bank Stock	(11,924)	(3,020)	(28,278)
Redemption of bank owned life insurance	25,782	0	0
Purchase of bank owned life insurance	(25,000)	(60,000)	0
Net cash from bank acquisitions	281,747	98,100	71,965
Additions to bank premises and equipment	(12,645)	(4,327)	(1,587)
Net Cash Used in Investing Activities	(364,875)	(412,511)	(342,502)
Cash Flows From Financing Activities
Net (decrease) increase in deposits	(384,403)	640,108	844,405
Net increase in repurchase agreements	50,464	1,956	33,488
Net decrease in FHLB borrowings with original maturities of three months or less	(62,500)	0	(235,000)
Repayments of FHLB borrowings with original maturities of more than three months	(7,500)	(33,000)	(115,000)
Proceeds from FHLB borrowings with original maturities of more than three months	75,000	0	35,000
Stock based employee benefit plans	3,408	5,022
Stock based employee benefit plans			(1,486)
Dividends paid	(41,242)	(22,506)	0
Net Cash (Used in) Provided by Financing Activities	(366,773)	591,580	561,407
Net (decrease) increase in cash and cash equivalents	(535,789)	333,641	279,557
Cash and Cash Equivalents at Beginning of Year	737,729	404,088	124,531
Cash and Cash Equivalents at End of Year	201,940	737,729	404,088
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	13,743	9,977	23,548
Cash paid during the period for taxes	29,591	30,887	27,712
Recognition of operating lease right-of-use assets, other than through bank acquisition, net of terminations	3,370	12,459	2,095
Recognition of operating lease liabilities, other than through bank acquisition, net of terminations	3,370	12,459	2,095
Supplemental disclosure of non-cash investing activities:1
Transfer of debt securities from available-for-sale to held-to-maturity	0	210,805	0
Unsettled sales of debt securities available-for-sale	0	17,147	0
Transfer from loans to other real estate owned	0	0	5,624
Transfer from bank premises to other real estate owned	$ 1,674	$ 3,318	$ 1,289