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Bank Premises and Equipment - Components of Bank Premises and Equipment (Detail) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Dec. 31, 2017
Property, Plant and Equipment [Line Items] |  |
Bank premises and equipment, gross | $ 30,290 | $ 28,983
Accumulated depreciation and amortization | (19,227) | (17,028)
Total | 11,063 | 11,955
Leasehold improvements |  |
Property, Plant and Equipment [Line Items] |  |
Bank premises and equipment, gross | $ 14,080 | 14,028
Leasehold improvements | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 3 years |
Leasehold improvements | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 25 years |
Furniture, fixtures and equipment |  |
Property, Plant and Equipment [Line Items] |  |
Bank premises and equipment, gross | $ 7,110 | 6,447
Furniture, fixtures and equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 5 years |
Furniture, fixtures and equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 10 years |
IT equipment |  |
Property, Plant and Equipment [Line Items] |  |
Bank premises and equipment, gross | $ 8,645 | 8,002
IT equipment | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 3 years |
IT equipment | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 5 years |
Automobiles |  |
Property, Plant and Equipment [Line Items] |  |
Bank premises and equipment, gross | $ 455 | $ 506
Automobiles | Minimum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 3 years |
Automobiles | Maximum |  |
Property, Plant and Equipment [Line Items] |  |
Expected useful life (years) | 5 years |

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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(14)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(8)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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