Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net income		$ 29,048	$ 7,942
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		2,625	2,279
Depreciation, amortization and accretion, net		5,879	4,038
Deferred income tax expense		2,261	1,231
Gain on sale of mortgage loans held for sale		(215)	(92)
Origination of mortgage loans held for sale		(24,683)	(35,829)
Proceeds from sale of mortgage loans held for sale		21,107	38,771
Bank owned life insurance income	[1]	(549)	(266)
Loss on the disposal of premises and equipment	[1]	2	0
Stock compensation expense		1,152	991
Excess tax expense (benefit) from share-based compensation arrangements		493	(643)
Net change in accrued interest receivable and other assets		3,659	6,404
Net change in accrued interest payable and other liabilities		(31,017)	(21,306)
Net cash provided by operating activities		9,762	3,520
Cash flows from investing activities:
Purchases of available for sale debt securities		0	(21,970)
Proceeds from sales of acquired available for sale debt securities		0	2,111
Proceeds from maturities and paydowns of available for sale debt securities		30,681	44,741
Purchases of held to maturity debt securities		0	(459,183)
Proceeds from maturities and paydowns of held to maturity debt securities		4,504	96,302
Purchases of Federal Home Loan Bank stock		(12,298)	0
Net change in non-PPP loans		(47,277)	(115,277)
Purchases of premises and equipment		(1,831)	(946)
Proceeds from sale or disposal of premises and equipment		103	0
Other investment activities		(255)	0
Proceeds from sales of other real estate owned		0	56
Cash from acquisition, net of cash paid		0	349,456
Net cash (used in) provided by investing activities		(17,337)	(35,337)
Cash flows from financing activities:
Net change in deposits		(34,057)	(162,533)
Net change in securities sold under agreements to repurchase and federal funds purchased		(22,808)	(994)
Proceeds from Federal Home Loan Bank advances		700,000	0
Repayments of Federal Home Loan Bank advances		(475,000)	0
Repayment of acquired line of credit		0	(3,200)
Share repurchases related to compensation plans		(2,368)	(2,617)
Cash disbursements to non-controlling interest		0	(53)
Cash dividends paid		(8,561)	(8,287)
Net cash (used in) provided by financing activities		157,206	(177,684)
Net change in cash and cash equivalents		149,631	(209,501)
Beginning cash and cash equivalents		167,367	961,192
Ending cash and cash equivalents		316,998	751,691
Supplemental cash flow information:
Interest paid		16,026	1,187
Income taxes paid, net of refunds		0	0
Cash paid for operating lease liabilities		1,071	853
Supplemental non-cash activity:
Unfunded commitments in tax credit investments		6,262	3,131
Dividends payable to stockholders		158	159
Premises and equipment transferred to premises held for sale		715	0
Fair value of assets acquired		0	1,403,509
Cash paid in acquisition		0	30,994
Common stock issued in acquisition		0	133,825
Non-controlling interest of acquired entity		0	3,094
Total consideration paid		0	167,913
Liabilities assumed		0	1,235,596
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Cash flows from investing activities:
Net change in PPP loans		$ 9,036	$ 69,373

[1] Outside of the scope of ASC 606.