Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)		3 Months Ended
		Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net income		$ 7,942,000	$ 22,710,000
Purchases of available for sale debt securities		(21,970,000)	(139,649,000)
Proceeds from sales of acquired available for sale debt securities		2,111,000	0
Proceeds from maturities and paydowns of available for sale debt securities		44,741,000	38,138,000
Purchases of held to maturity debt securities		(459,183,000)	0
Proceeds from maturities and paydowns of held to maturity debt securities		96,302,000	0
Proceeds from redemption of Federal Home Loan Bank stock		0	1,056,000
Net change in non-PPP loans		(115,277,000)	(40,855,000)
Purchases of premises and equipment		(946,000)	(560,000)
Other investment activities		0	(3,078,000)
Proceeds from sales of other real estate owned		56,000	0
Cash from acquisition, net of cash paid		349,456,000	0
Net cash used in investing activities		(35,337,000)	(207,647,000)
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		2,279,000	(1,475,000)
Depreciation, amortization and accretion, net		4,038,000	2,261,000
Deferred income tax expense		1,231,000	1,446,000
Gain on sale of mortgage loans held for sale		(92,000)	(1,196,000)
Origination of mortgage loans held for sale		(35,829,000)	(68,739,000)
Proceeds from sale of mortgage loans held for sale		38,771,000	85,903,000
Bank owned life insurance income	[1]	(266,000)	(161,000)
(Gain)/loss on the disposal of premises and equipment		26,000	0
Stock compensation expense		991,000	849,000
Excess tax benefit from share-based compensation arrangements		(643,000)	(1,009,000)
Net change in accrued interest receivable and other assets		6,404,000	3,710,000
Net change in accrued interest payable and other liabilities		(21,332,000)	(17,064,000)
Net cash provided by operating activities		3,520,000	27,235,000
Cash flows from financing activities:
Net change in deposits		(162,533,000)	211,320,000
Net change in securities sold under agreements to repurchase and federal funds purchased		(994,000)	880,000
Proceeds from Federal Home Loan Bank advances		0	10,000,000
Repayments of Federal Home Loan Bank advances		0	(17,486,000)
Repayment of acquired line of credit		(3,200,000)	0
Share repurchases related to compensation plans		(2,617,000)	(3,093,000)
Cash disbursements to noncontrolling interest		(53,000)	0
Cash dividends paid		(8,287,000)	(6,173,000)
Net cash (used in) provided by financing activities		(177,684,000)	195,448,000
Net change in cash and cash equivalents		(209,501,000)	15,036,000
Beginning cash and cash equivalents		961,192,000	317,945,000
Ending cash and cash equivalents		751,691,000	332,981,000
Interest paid		1,187,000	1,835,000
Income taxes paid, net of refunds		0	(105,000)
Cash paid for operating lease liabilities		853,000	520,000
Supplemental non-cash activity:
Unfunded commitments in tax credit investments		3,131,000	6,109,000
Dividends payable		159,000	185,000
Fair value of assets acquired		1,403,509,000	0
Consideration paid in acquisition		30,994,000	0
Common stock issued in acquisition		133,825,000	0
Noncontrolling interest of acquired entity		3,094	0
Total consideration paid		167,913,000	0
Liabilities assumed		1,235,596,000	0
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Cash flows from operating activities:
Net change in PPP loans		$ 69,373,000	$ (62,699,000)

[1] Outside of the scope of ASC 606.