Portfolio Loans - Loans identified as impaired, segregated by category (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2021	Dec. 31, 2020
Loans identified as impaired
Unpaid Contractual Principal Balance	$ 28,160	$ 30,342
Recorded Investment with No Allowance	13,785	15,850
Recorded Investment with Allowance	4,842	4,396
Total Recorded Investment	18,627	20,246
Related Allowance	2,508	1,625
Average Recorded Investment	21,609	25,299
Collateral dependent loans secured by real estate or business assets	15,300
Commercial Loans
Loans identified as impaired
Unpaid Contractual Principal Balance	16,008	16,771
Recorded Investment with No Allowance	2,987	4,001
Recorded Investment with Allowance	4,817	4,371
Total Recorded Investment	7,804	8,372
Related Allowance	2,483	1,600
Average Recorded Investment	7,524	7,920
Commercial Real Estate Loans
Loans identified as impaired
Unpaid Contractual Principal Balance	6,523	7,406
Recorded Investment with No Allowance	5,552	6,067
Total Recorded Investment	5,552	6,067
Average Recorded Investment	8,075	9,349
Real Estate Construction
Loans identified as impaired
Unpaid Contractual Principal Balance	287	292
Recorded Investment with No Allowance	287	292
Total Recorded Investment	287	292
Average Recorded Investment	450	581
Retail Real Estate
Loans identified as impaired
Unpaid Contractual Principal Balance	5,342	5,873
Recorded Investment with No Allowance	4,959	5,490
Recorded Investment with Allowance	25	25
Total Recorded Investment	4,984	5,515
Related Allowance	25	25
Average Recorded Investment	$ 5,560	7,439
Retail Other
Loans identified as impaired
Average Recorded Investment		$ 10