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Loans Receivable - Past Due Loans (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 4,001,295		$ 4,001,295		$ 3,815,662
90 days or more and still accruing	20		20		293
Financing Receivable, Unamortized Purchase Premium (Discount)	2,686		2,686		3,938
Debt Securities, Held-to-maturity, Nonaccrual	0		0		0
Debt Securities, Held-to-maturity, 90 Days or More Past Due, Still Accruing	0		0		0
Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method	0	$ (1)	(14)	$ (11)
Impaired Financing Receivable, Interest Income, Accrual Method	31	216	1,174	2,763
Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,003		3,003		10,190
90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,339		4,339		7,807
Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	7,342		7,342		17,997
Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,993,953		3,993,953		3,797,665
Commercial Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,245,221		3,245,221		3,191,656
Commercial Portfolio Segment [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method			(14)	(11)
Impaired Financing Receivable, Interest Income, Accrual Method			1,087	2,658
Commercial Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	2,267		2,267		4,478
Commercial Portfolio Segment [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,319		4,319		7,226
Commercial Portfolio Segment [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	6,586		6,586		11,704
Commercial Portfolio Segment [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,238,635		3,238,635		3,179,952
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	735,028		735,028		621,567
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method	0	(1)	(14)	(11)
Impaired Financing Receivable, Interest Income, Accrual Method	31	184	260	2,228
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,774		1,774		1,858
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	4,130		4,130		6,821
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	5,904		5,904		8,679
Commercial Portfolio Segment [Member] | Commercial and Industrial [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	729,124		729,124		612,888
Commercial Portfolio Segment [Member] | SBA PPP Loans [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,593		3,593		145,840
Commercial Portfolio Segment [Member] | SBA PPP Loans [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	167		167		223
Commercial Portfolio Segment [Member] | SBA PPP Loans [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		293
Commercial Portfolio Segment [Member] | SBA PPP Loans [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	167		167		516
Commercial Portfolio Segment [Member] | SBA PPP Loans [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	3,426		3,426		145,324
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	959,486		959,486		931,150
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method			0	0
Impaired Financing Receivable, Interest Income, Accrual Method			53	117
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	30		30		2,397
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	189		189		112
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	219		219		2,509
Commercial Portfolio Segment [Member] | Owner Occupied Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	959,267		959,267		928,641
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,547,114		1,547,114		1,493,099
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method			0	0
Impaired Financing Receivable, Interest Income, Accrual Method			774	313
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	296		296		0
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		0
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	296		296		0
Commercial Portfolio Segment [Member] | Non Owner Occupied Commercial Real Estate [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	1,546,818		1,546,818		1,493,099
Residential Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	296,019		296,019		164,582
Residential Portfolio Segment [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method			0	0
Impaired Financing Receivable, Interest Income, Accrual Method			19	0
Residential Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		420
Residential Portfolio Segment [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		10
Residential Portfolio Segment [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		430
Residential Portfolio Segment [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	296,019		296,019		164,152
Real Estate Construction and Land Development
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	253,020		253,020		226,883
Real Estate Construction and Land Development | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		4,266
Real Estate Construction and Land Development | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		571
Real Estate Construction and Land Development | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		4,837
Real Estate Construction and Land Development | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	253,020		253,020		222,046
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	92,297		92,297		85,547
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method			0	0
Impaired Financing Receivable, Interest Income, Accrual Method			0	73
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		792
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		0
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		792
Real Estate Construction and Land Development | One-to-four Family Real Estate Construction | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	92,297		92,297		84,755
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	160,723		160,723		141,336
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		3,474
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		571
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	0		0		4,045
Real Estate Construction and Land Development | Five or More Family Residential and Commercial Properties [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	160,723		160,723		137,291
Consumer Portfolio Segment [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	207,035		207,035		232,541
Consumer Portfolio Segment [Member] | Nonaccrual [Member]
Financing Receivable, Past Due [Line Items]
Impaired Financing Receivable Interest Income Reversal Accrual Method	0	0	0	0
Impaired Financing Receivable, Interest Income, Accrual Method	0	$ 32	68	$ 32
Consumer Portfolio Segment [Member] | Financing Receivables, 30 to 89 Days Past Due [Member]
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	736		736		1,026
Consumer Portfolio Segment [Member] | 90 Days or Greater
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	20		20		0
Consumer Portfolio Segment [Member] | Financial Asset, Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	756		756		1,026
Consumer Portfolio Segment [Member] | Financial Asset, Not Past Due
Financing Receivable, Past Due [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 206,279		$ 206,279		$ 231,515

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