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Loan and Lease Receivables, Impaired Loans and Leases and Allowance for Loan and Lease Losses (Non-accrual Loans) (Details) - USD ($) $ in Thousands | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | --- | ---
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | $ 25,301 | $ 26,389 |
Foreclosed properties, net | 2,547 | 1,069 |
Total non-performing assets | 27,848 | 27,458 |
Performing troubled debt restructurings | 180 | 332 | $ 717
Total impaired assets | $ 28,028 | $ 27,790 |
Total non-accrual loans and leases to gross loans and leases | 1.56% | 1.76% |
Total non-performing assets to total gross loans and leases plus foreclosed properties, net | 1.72% | 1.83% |
Total non-performing assets to total assets | 1.42% | 1.53% |
Allowance for loan and lease losses to gross loans and leases | 1.26% | 1.25% |
Allowance for loan and lease losses to non-accrual loans and leases | 80.73% | 71.10% |
Commercial real estate — owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | $ 5,663 | $ 7,021 |
Commercial real estate — non-owner occupied |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 31 | 34 |
Land development |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 2,213 | 2,626 |
Construction |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 0 | 2,872 |
Multi-family |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 0 | 0 |
1-4 family |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 0 | 1,161 |
Total commercial real estate |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 7,907 | 13,714 |
Commercial and industrial |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 17,104 | 12,321 |
Direct financing leases, net |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 0 | 0 |
Home equity and second mortgages |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 0 | 0 |
Other |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | 290 | 354 |
Total consumer and other loans |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Non-accruing loans and leases | $ 290 | $ 354 |

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