| Type | including |
|---|---|
| Role | http://fasb.org/us-gaap/role/disclosure/EquityAuctionMarketPreferredSecuritiesStockSeriesTable |
| Type | Element |
|---|---|
| Hypercube | us-gaap:AuctionMarketPreferredSecuritiesStockSeriesTable |
| Explicit | us-gaap:AuctionMarketPreferredSecuritiesStockSeriesAxis |
| Member | us-gaap:AuctionMarketPreferredSecuritiesStockSeriesTitleDomain |
| Member | us-gaap:SeriesAMember |
| Member | us-gaap:SeriesBMember |
| Label/QName |
|---|
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesLineItems |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesLiquidationValue |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesParValuePerShare |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesRateSettingInterval1 |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesPerShareRedemptionAmount |
us-gaap:MovementInAuctionMarketPreferredSecuritiesSharesOutstandingRollForward |
us-gaap:AuctionMarketPreferredSecuritiesSharesOutstanding |
us-gaap:AuctionMarketPreferredSecuritiesSharesIssued |
us-gaap:AuctionMarketPreferredSecuritiesSharesRedeemed |
us-gaap:AuctionMarketPreferredSecuritiesStockSharesOutstandingPeriodIncreaseDecrease |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesSharesAuthorized |
us-gaap:AuctionMarketPreferredSecuritiesStockSeriesVariableInterestRateEarned |