Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		6 Months Ended
		Jun. 30, 2022	Jun. 30, 2021
Cash flows from operating activities:
Net income		$ 34,844	$ 26,894
Purchases of available for sale debt securities		(85,659)	(204,228)
Proceeds from sales of acquired available for sale debt securities		2,111	91,094
Proceeds from maturities and paydowns of available for sale debt securities		78,409	80,122
Purchases of held to maturity debt securities		(459,183)	0
Proceeds from maturities and paydowns of held to maturity debt securities		159,119	0
Proceeds from redemption of Federal Home Loan Bank stock		0	3,881
Net change in non-PPP loans		(180,130)	(158,253)
Purchases of premises and equipment		(13,563)	(1,752)
Other investment activities		0	(3,965)
Proceeds from sales of other real estate owned		56	261
Cash from acquisition, net of cash paid		349,456	24,981
Net cash provided by (used in) investing activities		(45,417)	68,005
Adjustments to reconcile net income to net cash provided by operating activities:
Provision for credit losses		2,079	2,672
Depreciation, amortization and accretion, net		10,031	4,888
Deferred income tax expense		4,771	2,307
Gain on sale of mortgage loans held for sale		(504)	(2,118)
Origination of mortgage loans held for sale		(79,643)	(119,431)
Proceeds from sale of mortgage loans held for sale		82,275	141,747
Bank owned life insurance income	[1]	(536)	(367)
Loss on the disposal of premises and equipment		28	41
Gain on the sale of other real estate owned		0	(47)
Stock compensation expense		2,048	2,263
Excess tax benefit from share-based compensation arrangements		(1,112)	(1,150)
Net change in accrued interest receivable and other assets		(4,747)	(4,420)
Net change in accrued interest payable and other liabilities		(27,776)	(6,105)
Net cash provided by operating activities		21,758	47,174
Cash flows from financing activities:
Net change in deposits		(358,526)	232,255
Net change in securities sold under agreements to repurchase and federal funds purchased		18,223	4,086
Proceeds from Federal Home Loan Bank advances		0	20,000
Repayments of Federal Home Loan Bank advances		0	(132,745)
Repayment of acquired line of credit		(3,200)	0
Share repurchases related to compensation plans		(3,559)	(3,166)
Cash disbursements to non-controlling interest		(208)	0
Cash dividends paid		(16,394)	(13,361)
Net cash (used in) provided by financing activities		(363,664)	107,069
Net change in cash and cash equivalents		(387,323)	222,248
Beginning cash and cash equivalents		961,192	317,945
Ending cash and cash equivalents		573,869	540,193
Interest paid		2,147	2,971
Income taxes paid, net of refunds		7,989	13,359
Cash paid for operating lease liabilities		1,800	1,190
Supplemental non-cash activity:
Unfunded commitments in tax credit investments		6,907	5,766
Due to broker		0	1,985
Dividends payable to stockholders		182	175
Loans transferred to OREO		445	30
Fair value of assets acquired		1,403,509	1,389,327
Consideration paid in acquisition		30,994	28,276
Common stock issued in acquisition		133,825	204,670
Non-controlling interest of acquired entity		3,094	0
Total consideration paid		167,913	232,946
Liabilities assumed		1,235,596	1,156,381
Small Business Administration (SBA), CARES Act, Paycheck Protection Program [Member]
Cash flows from operating activities:
Net change in PPP loans		$ 103,967	$ 235,864

[1] Outside of the scope of ASC 606.