| Standard label: | Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds | 
| Name: | us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds | 
| Documentation: | Amount of advances or credit lines available from the Federal Home Loan Bank (FHLB). | 
| Object type: | cm:Concept | 
| Data type: | Monetary (xbrli:monetaryItemType) | 
| Period type: | As Of (instant) | 
| Balance type: | Credit | 
| Abstract: | false | 
| Workiva Wdesk Taxonomy Analyzer: | us-gaap:FederalHomeLoanBankAdvancesGeneralDebtObligationsDisclosuresAmountOfAvailableUnusedFunds | 
| Label | Role | Language | 
| Federal Home Loan Bank, Advances, General Debt Obligations, Amount of Available, Unused Funds | http://www.xbrl.org/2003/role/label | en-US | 
| Reference | Role | Topic | 
| FASB Accounting Standards Codification 210 10 S99 1 (SX 210.5-02.22 (b)) | http://fasb.org/us-gaap/role/ref/legacyRef | 210 | 
| FASB Accounting Standards Codification 942 210 S99 1 (SX 210.9-03.13(3)(a)) | http://fasb.org/us-gaap/role/ref/legacyRef | 942 | 
| FASB Accounting Standards Codification 942 470 45 1 | http://fasb.org/us-gaap/role/ref/legacyRef | 942 |