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Concentrations of Credit Risk (Details) - Credit Concentration Risk [Member] - Tier 1 Capital Plus Allowance for Loan and Lease Losses [Member] | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017
Hotel/Motel Industry Credits [Member] |  |
Concentration Risk [Abstract] |  |
Concentration of credit risk | 41.00% | 47.00%
Lessors of Non-residential Buildings Credits [Member] |  |
Concentration Risk [Abstract] |  |
Concentration of credit risk | 39.00% | 45.00%
Lessors of Residential Buildings and Dwellings Credits [Member] |  |
Concentration Risk [Abstract] |  |
Concentration of credit risk | 39.00% | 39.00%

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=109250915&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
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