Amount of recovery of loans and lease receivables which had previously been fully or partially written-off as bad debts.

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Amount of loans and leases that have been written off from both loan receivables and allowance reserve for credit loss.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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Amount, after recoveries, of loans and leases that have been written-off.

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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 of expense related to estimated loss from loan and lease transactions.

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Allowance for Loan Losses and Reserve for Unfunded Loan Commitments - Activity in the Allowance for Loan Losses by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				$ 15,488				$ 13,556				$ 12,579	$ 15,488	$ 13,556	$ 12,579
Charge-offs													(1,242)	(386)	(911)
Recoveries													49	268	238
Net (charge-offs) recoveries													(1,193)	(118)	(673)
Provision (credit) for loan losses charged to expense	$ 500	$ 750	$ 350	500	$ 500	$ 500	$ 550	500	$ 500	$ 500	$ 400	250	2,100	2,050	1,650
Balance, end of period	16,395				15,488				13,556				16,395	15,488	13,556
SBA loans held for investment
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				1,655				1,471				1,576	1,655	1,471	1,576
Charge-offs													(535)	(354)	(293)
Recoveries													23	72	121
Net (charge-offs) recoveries													(512)	(282)	(172)
Provision (credit) for loan losses charged to expense													(64)	466	67
Balance, end of period	1,079				1,655				1,471				1,079	1,655	1,471
Commercial loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				8,705				7,825				7,302	8,705	7,825	7,302
Charge-offs													(501)	(10)	(227)
Recoveries													16	30	102
Net (charge-offs) recoveries													(485)	20	(125)
Provision (credit) for loan losses charged to expense													1,502	860	648
Balance, end of period	9,722				8,705				7,825				9,722	8,705	7,825
Residential mortgage loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				3,900				3,130				2,593	3,900	3,130	2,593
Charge-offs													(205)	0	(55)
Recoveries													0	13	12
Net (charge-offs) recoveries													(205)	13	(43)
Provision (credit) for loan losses charged to expense													559	757	580
Balance, end of period	4,254				3,900				3,130				4,254	3,900	3,130
Consumer loans
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				1,228				1,130				925	1,228	1,130	925
Charge-offs													(1)	(22)	(336)
Recoveries													10	153	3
Net (charge-offs) recoveries													9	131	(333)
Provision (credit) for loan losses charged to expense													103	(33)	538
Balance, end of period	1,340				1,228				1,130				1,340	1,228	1,130
Unallocated
Allowance for Loan and Lease Losses [Roll Forward]
Balance, beginning of period				$ 0				$ 0				$ 183	0	0	183
Charge-offs														0	0
Recoveries														0	0
Net (charge-offs) recoveries													0	0	0
Provision (credit) for loan losses charged to expense													0	0	(183)
Balance, end of period	$ 0				$ 0				$ 0				$ 0	$ 0	$ 0