Concentration risk percentage greater than ten percent.

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Financing Receivable, Interest Rate

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Financing Receivable, Maturity

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Number of loan segments.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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- Definition

Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement.

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Carrying amount as of the balance sheet date of interest earned but not received. Also called accrued interest or accrued interest receivable.

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Amount of allowance to cover probable credit losses on loans and leases. Includes carryover of or adjustments to the allowance for loan losses in connection with business combinations. Excludes allowance for loans and leases covered under loss sharing agreements.

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Amount before allowance and after deduction of deferred interest and fees, unamortized costs and premiums and discounts from face amounts, of loans and leases held in portfolio, including but not limited to, commercial and consumer loans. Excludes loans and leases covered under loss sharing agreements.

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Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

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Loans Receivable - Loan Origination/Risk Management (Details) $ in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2020 USD ($) segment	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)	Jan. 01, 2020 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 17,813	$ 14,446
Number of loan segments \| segment	4
Loans receivable	$ 4,666,333	3,767,879
Allowance for credit losses on loans	71,501
Loans and Leases Receivable, Allowance		36,171	$ 47,540	$ 37,993	$ 36,363	$ 36,152	$ 35,042
Loans and Leases Receivable, Net Amount	$ 4,594,832	$ 3,731,708
Concentration Risk Percentage Greater than Ten Percent	0	0
Concentration Risk, Percentage	10.00%	10.00%
Loans Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accrued interest receivable	$ 13,900	$ 10,700
Commercial Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	3,839,785	2,946,233
Allowance for credit losses on loans	50,442
Loans and Leases Receivable, Allowance		23,933	27,866	20,998	25,123	24,836	23,711
Commercial Portfolio Segment [Member] \| Commercial and Industrial [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	793,217	852,220
Allowance for credit losses on loans	29,773
Loans and Leases Receivable, Allowance		11,739	13,900	10,391	11,993	11,755	11,343
Commercial Portfolio Segment [Member] \| Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	838,303	805,234
Allowance for credit losses on loans	10,003
Loans and Leases Receivable, Allowance		4,512	6,216	4,964	5,066	5,256	4,898
Commercial Portfolio Segment [Member] \| Non Owner Occupied Commercial Real Estate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	1,351,775	1,288,779
Allowance for credit losses on loans	10,666
Loans and Leases Receivable, Allowance		7,682	7,750	5,643	8,064	7,825	7,470
Commercial Portfolio Segment [Member] \| Paycheck Protection Program
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	856,490	0
Allowance for credit losses on loans	$ 0
Loans and Leases Receivable, Allowance		0	0	0
Commercial Portfolio Segment [Member] \| SBA PPP Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest rate (as a percent)	1.00%
Unamortized net deferred fees	$ 25,300
Loans receivable	$ 856,490
Commercial Portfolio Segment [Member] \| SBA PPP Loans [Member] \| Minimum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity of loans	2 years
Commercial Portfolio Segment [Member] \| SBA PPP Loans [Member] \| Maximum
Accounts, Notes, Loans and Financing Receivable [Line Items]
Maturity of loans	5 years
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	$ 132,546	131,660
Allowance for credit losses on loans	2,223
Loans and Leases Receivable, Allowance		1,458	3,026	2,929	1,345	1,247	1,203
Real Estate Construction and Land Development
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	305,984	274,646
Allowance for credit losses on loans	9,124
Loans and Leases Receivable, Allowance		3,060	12,308	9,729	2,531	2,417	2,194
Real Estate Construction and Land Development \| One-to-four Family Real Estate Construction
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	108,821	104,296
Allowance for credit losses on loans	567
Loans and Leases Receivable, Allowance		1,455	864	884	1,471	1,422	1,240
Real Estate Construction and Land Development \| Five or More Family Residential and Commercial Properties [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	197,163	170,350
Allowance for credit losses on loans	8,557
Loans and Leases Receivable, Allowance		1,605	11,444	8,845	1,060	995	954
Consumer Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable	388,018	415,340
Allowance for credit losses on loans	$ 9,712
Loans and Leases Receivable, Allowance		$ 6,821	$ 4,340	$ 4,337	$ 6,540	$ 6,480	$ 6,581