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v3.20.1

Summary of significant accounting policies (Details) | 12 Months Ended |
--- | --- | ---
Dec. 31, 2019 USD ($) Office | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($) | Jan. 01, 2019 USD ($)
Number of full-service community banking offices | Office | 28 |  |  |
Number of limited purpose banking offices | $ 1 |  |  |
Minimum lease payments due | 8,227,000 |  |  |
Reclassification of prior period items amounts effect on net income | $ 0 |  |  |
Debt service coverage ratio | 1.2 |  |  |
Non performing loans past due period for Non-accrual status | 90 days |  |  |
Maximum days of consumer loans past due | 120 days |  |  |
Impairment losses on intangible assets | $ 0 | $ 0 | $ 0 |
Advertising expense | $ 873,000 | 720,000 | 942,000 |
Income tax benefit recognition threshold | 50.00% |  |  |
Unrecognized tax benefit or accrued interest and penalties | $ 0 | $ 0 | $ 0 |
Lease liabilities for operating leases | 6,194,000 |  |  |
Right-of-use assets | $ 6,125,000 |  |  |
Minimum |  |  |  |
Contractual terms | 6 months |  |  |
Maximum |  |  |  |
Finite useful life of intangible assets | 10 years |  |  |
Commercial Real Estate |  |  |  |
Maximum loan to value percentage | 80.00% |  |  |
Residential Mortgage | Maximum |  |  |  |
Maximum amortization period | 30 years |  |  |
Accounting Standards Update 2016-02 | Restatement Adjustment |  |  |  |
Lease liabilities for operating leases |  |  |  | $ 6,523,000
Right-of-use assets |  |  |  | $ 6,523,000

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