Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Condensed Consolidated Statements of Cash Flows [Abstract]
Net Income		$ 50,387	$ 39,166
Adjustments to Reconcile Net Income to Net Cash From Operating Activities
Proceeds from sales of loans held for sale		986,440	1,074,284
Disbursements for loans held for sale		(952,038)	(1,057,544)
Provision for credit losses	[1]	(2,558)
Provision for credit losses	[1]		12,884
Deferred income tax expense (benefit)		820	(2,140)
Net deferred loan fees (costs)		(5,208)	5,227
Net depreciation, amortization of intangible assets and premiums and accretion of discounts on securities and loans		9,276	5,962
Net gains on mortgage loans		(30,280)	(46,687)
Net gains on securities available for sale		(1,421)	(253)
Share based compensation		1,446	1,506
Increase in accrued income and other assets		(10,537)	(1,564)
Increase in accrued expenses and other liabilities		9,585	7,397
Total Adjustments		5,525	(928)
Net Cash From Operating Activities		55,912	38,238
Cash Flow Used in Investing Activities
Proceeds from the sale of securities available for sale		81,683	36,593
Proceeds from maturities, prepayments and calls of securities available for sale		306,515	197,098
Purchases of securities available for sale		(648,113)	(639,166)
Proceeds from the maturity of interest bearing deposits - time		0	350
Purchase of Federal Home Loan Bank stock		0	(68)
Net increase in portfolio loans (loans originated, net of principal payments)		(142,164)	(167,506)
Proceeds from the sale of portfolio loans		9,581	2,395
Proceeds from bank-owned life insurance		467	1,441
Proceeds from the sale of other real estate and repossessed assets		960	564
Capital expenditures		(4,538)	(2,603)
Net Cash Used in Investing Activities		(395,609)	(570,902)
Cash Flow From Financing Activities
Net increase in total deposits		374,713	561,018
Net decrease in other borrowings		(5)	(25,001)
Proceeds from Federal Home Loan Bank Advances		0	239,254
Payments of Federal Home Loan Bank Advances		0	(272,910)
Proceeds from issuance of subordinated debt, net of issuance costs		0	39,236
Dividends paid		(13,686)	(13,239)
Proceeds from issuance of common stock		55	11
Repurchase of common stock		(13,773)	(13,784)
Share based compensation withholding obligation		(691)	(669)
Net Cash From Financing Activities		346,613	513,916
Net Increase (Decrease) in Cash and Cash Equivalents		6,916	(18,748)
Cash and Cash Equivalents at Beginning of Period		118,705	65,304
Cash and Cash Equivalents at End of Period		125,621	46,556
Cash paid during the period for
Interest		5,865	11,636
Income taxes		12,059	10,500
Operating leases		1,307	1,357
Transfers to other real estate and repossessed assets		216	332
Purchase of securities available for sale not yet settled		28,078	23,844
Securitization of portfolio loans		0	26,325
Right of use assets obtained in exchange for lease obligations		$ 283	$ 279

[1] Beginning January 1, 2021, calculation is based on CECL methodology. Prior to January 1, 2021, calculation was based on the probable incurred loss methodology.