Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Operating activities:
Net income	$ 89,076	$ 89,433
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation of premises and equipment, and amortization	4,489	4,923
Amortization of intangible assets	4,632	4,271
Provision for (reversal of) credit losses on loans	13,645	(7,880)
Amortization of investment securities premium, net	6,564	4,702
Originations of loans for resale	(62,192)	(175,127)
Proceeds from sale of loans originated for resale	66,973	184,896
Gain on sale of loans	(2,145)	(7,908)
Change in market value of mortgage servicing rights	(443)	691
Provision for losses on foreclosed assets	113	0
Gain on transfer of loans to foreclosed assets	(224)	(133)
Gain on sale of foreclosed assets	(22)	(68)
Operating lease expense payments	(4,351)	(3,690)
Gain on disposal of fixed assets	(1,069)	(445)
Increase in cash value of life insurance	(2,049)	(2,062)
Gain on life insurance death benefit	(309)	0
Loss on marketable equity securities	346	59
Equity compensation vesting expense	2,711	1,900
Change in:
Interest receivable	(4,384)	1,579
Interest payable	(601)	(306)
Amortization of operating lease ROUA	4,432	4,038
Other assets and liabilities, net	(7,201)	1,046
Net cash from operating activities	107,991	99,919
Investing activities:
Proceeds from maturities of securities available for sale	212,501	263,865
Proceeds from maturities of securities held to maturity	31,421	66,880
Purchases of securities available for sale	(699,035)	(960,668)
Loan origination and principal collections, net	(603,581)	(21,869)
Loans purchased	(21,292)	(102,710)
Proceeds from sale of other real estate owned	416	944
Proceeds from sale of premises and equipment	6,689	2,743
Purchases of premises and equipment	(3,130)	(2,114)
Proceeds from conversion of life insurance	641	0
Cash acquired from VRB, net of cash consideration paid	426,883	0
Net cash used by investing activities	(648,487)	(752,929)
Financing activities:
Net change in deposits	73,131	730,888
Net change in other borrowings	(3,019)	18,687
Repurchase of common stock, net of option exercises	(26,844)	(3,675)
Dividends paid	(25,796)	(22,291)
Exercise of stock options	1,112	86
Net cash from financing activities	18,584	723,695
Net change in cash and cash equivalents	(521,912)	70,685
Cash and cash equivalents, beginning of period	768,421	669,551
Cash and cash equivalents, end of period	246,509	740,236
Supplemental disclosure of noncash activities:
Unrealized loss on securities available for sale	(317,659)	(11,249)
Loans transferred to held-for-sale	12,044	0
Market value of shares tendered in-lieu of cash to pay for exercise of options and/or related taxes	2,444	835
Obligations incurred in conjunction with leased assets	4,609	2,883
Loans transferred to foreclosed assets	1,131	549
Supplemental disclosure of cash flow activity:
Cash paid for interest expense	5,515	4,573
Cash paid for income taxes	$ 36,000	$ 38,500