| SourceName | Financial Instruments-Recognition and Measurement | http://fasb.org/srt/role/changeNote/changeNote |
| TaxonomyVersion | 2018 | http://fasb.org/srt/role/changeNote/changeNote |
| ChangeDate | 2017-08 | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedLabels | true | http://fasb.org/srt/role/changeNote/changeNote |
| ModifiedDocumentation | true | http://fasb.org/srt/role/changeNote/changeNote |
| PreviousDocumentation | For any transfers from securities categorized as held-to-maturity, describe the circumstances leading to the decision to transfer the security to another category of investments in debt and equity securities (trading or available-for-sale). Such transfers are generally not expected to occur, but may be justified in circumstances such as: (a) evidence of a significant deterioration in the issuer's creditworthiness; (b) a change in tax law that eliminates or reduces the tax-exempt status of interest on the debt security (but not a change in tax law that revises the marginal tax rates applicable to interest income); (c) a major business combination or major disposition (such as sale of a component of an entity) that necessitates the sale or transfer of held-to-maturity securities to maintain the enterprise's existing interest rate risk position or credit risk policy; (d) a change in statutory or regulatory requirements significantly modifying either what constitutes a permissible investment or the maximum level of investments in certain kinds of securities, thereby causing an enterprise to dispose of a held-to-maturity security; (e) a significant increase by the regulator in the industry's capital requirements that causes the enterprise to downsize by selling held-to-maturity securities; or (f) a significant increase in the risk weights of debt securities used for regulatory risk-based capital purposes. | http://fasb.org/srt/role/changeNote/changeNote |
| Source_ASU_Number | 2016-01 | http://fasb.org/srt/role/changeNote/changeNote |
| Publisher | FASB | http://fasb.org/us-gaap/role/ref/legacyRef |
| Name | Accounting Standards Codification | http://fasb.org/us-gaap/role/ref/legacyRef |
| Topic | 320 | http://fasb.org/us-gaap/role/ref/legacyRef |
| SubTopic | 10 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Section | 50 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Paragraph | 10 | http://fasb.org/us-gaap/role/ref/legacyRef |
| Subparagraph | (d) | http://fasb.org/us-gaap/role/ref/legacyRef |
| URI | http://asc.fasb.org/extlink&oid=121645371&loc=d3e27405-111563 | http://fasb.org/us-gaap/role/ref/legacyRef |