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Loans (Impaired Loans) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2018
Dec. 31, 2017
With an allowance recorded [Abstract]    
Related allowance $ 2,100  
Total allowance recorded [Abstract]    
Recorded investment 6,173 $ 5,475
Unpaid principal balance 7,420 6,414
Related allowance 2,110 1,914
Average recorded investment 6,267 6,058
Interest income recognized 110 114
SBA Non-Real Estate [Member]    
Without an allowance recorded [Abstract]    
Recorded investment 193 459
Unpaid principal balance 1,328 1,286
Average recorded investment 374 311
Interest income recognized   12
With an allowance recorded [Abstract]    
Recorded investment 2,779 2,399
Unpaid principal balance 2,779 2,399
Related allowance 1,844 1,689
Average recorded investment 2,636 2,507
Interest income recognized 25 60
Total allowance recorded [Abstract]    
Recorded investment 2,972 2,858
Unpaid principal balance 4,107 3,685
Related allowance 1,844 1,689
Average recorded investment 3,010 2,818
Interest income recognized 25 72
SBA Commercial Mortgage [Member]    
With an allowance recorded [Abstract]    
Recorded investment 458 693
Unpaid principal balance 458 693
Related allowance 71 225
Average recorded investment 517 747
Total allowance recorded [Abstract]    
Recorded investment 458 693
Unpaid principal balance 458 693
Related allowance 71 225
Average recorded investment 517 747
Direct Lease Financing [Member]    
Without an allowance recorded [Abstract]    
Recorded investment 454 229
Unpaid principal balance 566 341
Average recorded investment 421 103
Interest income recognized 22 33
With an allowance recorded [Abstract]    
Recorded investment 671  
Unpaid principal balance 671  
Related allowance 195  
Average recorded investment 663 405
Interest income recognized 56  
Total allowance recorded [Abstract]    
Recorded investment 1,125 229
Unpaid principal balance 1,237 341
Related allowance 195  
Average recorded investment 1,084 508
Interest income recognized 78 33
Consumer - other [Member]    
Without an allowance recorded [Abstract]    
Average recorded investment   259
With an allowance recorded [Abstract]    
Average recorded investment   14
Total allowance recorded [Abstract]    
Average recorded investment   273
Consumer - Home Equity [Member]    
Without an allowance recorded [Abstract]    
Recorded investment 1,618 1,695
Unpaid principal balance 1,618 1,695
Average recorded investment 1,656 1,712
Interest income recognized 7 9
Total allowance recorded [Abstract]    
Recorded investment 1,618 1,695
Unpaid principal balance 1,618 1,695
Average recorded investment 1,656 1,712
Interest income recognized $ 7 $ 9