Allowance for Loan and Lease Losses - Recorded Investment on Impaired Loans (Details) - USD ($)
$ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
| Originated Loans and Leases |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
$ 11,837
|
$ 10,762
|
| Unpaid principal balance with no related allowance |
11,832
|
11,168
|
| Recorded investment with related allowance |
513
|
2,192
|
| Unpaid principal balance with related allowance |
532
|
2,318
|
| Related Allowance |
441
|
417
|
| Recorded investment |
12,350
|
12,954
|
| Unpaid principal balance |
12,364
|
13,486
|
| Originated Loans and Leases | Commercial and industrial | Other |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
1,246
|
276
|
| Unpaid principal balance with no related allowance |
1,250
|
370
|
| Recorded investment with related allowance |
513
|
359
|
| Unpaid principal balance with related allowance |
532
|
276
|
| Related Allowance |
441
|
95
|
| Originated Loans and Leases | Commercial real estate | Other |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
6,626
|
6,979
|
| Unpaid principal balance with no related allowance |
6,533
|
7,263
|
| Recorded investment with related allowance |
0
|
1,833
|
| Unpaid principal balance with related allowance |
0
|
2,042
|
| Related Allowance |
0
|
322
|
| Originated Loans and Leases | Residential real estate | Home equity |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
3,965
|
3,507
|
| Unpaid principal balance with no related allowance |
4,049
|
3,535
|
| Acquired Loans and Leases |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
3,421
|
5,547
|
| Unpaid principal balance with no related allowance |
3,554
|
6,230
|
| Recorded investment with related allowance |
50
|
78
|
| Unpaid principal balance with related allowance |
50
|
78
|
| Related Allowance |
25
|
76
|
| Recorded investment |
3,471
|
5,625
|
| Unpaid principal balance |
3,604
|
6,308
|
| Acquired Loans and Leases | Commercial and industrial | Other |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
226
|
172
|
| Unpaid principal balance with no related allowance |
226
|
472
|
| Recorded investment with related allowance |
50
|
0
|
| Unpaid principal balance with related allowance |
50
|
0
|
| Related Allowance |
25
|
0
|
| Acquired Loans and Leases | Commercial real estate | Other |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
1,372
|
4,003
|
| Unpaid principal balance with no related allowance |
1,474
|
4,386
|
| Recorded investment with related allowance |
0
|
78
|
| Unpaid principal balance with related allowance |
0
|
78
|
| Related Allowance |
0
|
76
|
| Acquired Loans and Leases | Residential real estate | Home equity |
|
|
| Financing Receivable, Impaired [Line Items] |
|
|
| Recorded investment with no related allowance |
1,823
|
1,372
|
| Unpaid principal balance with no related allowance |
$ 1,854
|
$ 1,372
|