Portfolio loans - Past Due and Still Accruing or on a Non-accrual Status Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Loans past due
Loans past due, still accruing		$ 1,601
90+Days	$ 356
Non-accrual Loans	36,230	34,997
30 to 59 Days
Loans past due
Loans past due, still accruing	7,069	5,053
60 to 89 Days
Loans past due
Loans past due, still accruing	3,711	2,068
Commercial
Loans past due
Loans past due, still accruing		775
90+Days	72
Non-accrual Loans	16,243	17,953
Commercial | 30 to 59 Days
Loans past due
Loans past due, still accruing	410	158
Commercial | 60 to 89 Days
Loans past due
Loans past due, still accruing	1,500	140
Commercial real estate
Loans past due
Non-accrual Loans	9,761	10,298
Commercial real estate | 30 to 59 Days
Loans past due
Loans past due, still accruing	1,662	148
Commercial real estate | 60 to 89 Days
Loans past due
Loans past due, still accruing	595	558
Real estate construction
Loans past due
Loans past due, still accruing		58
Non-accrual Loans	1,126	18
Real estate construction | 30 to 59 Days
Loans past due
Loans past due, still accruing	191	121
Retail real estate
Loans past due
Loans past due, still accruing		766
90+Days	284
Non-accrual Loans	9,080	6,698
Retail real estate | 30 to 59 Days
Loans past due
Loans past due, still accruing	4,442	4,578
Retail real estate | 60 to 89 Days
Loans past due
Loans past due, still accruing	1,596	1,368
Retail other
Loans past due
Loans past due, still accruing		2
Non-accrual Loans	20	30
Retail other | 30 to 59 Days
Loans past due
Loans past due, still accruing	364	48
Retail other | 60 to 89 Days
Loans past due
Loans past due, still accruing	$ 20	$ 2