Text Block Comparison: Schedule of Auction Market Preferred Securities by Stock Series [Table Text Block] (us-gaap:ScheduleOfAuctionMarketPreferredSecuritiesByStockSeriesTextBlock)

Documentation: Tabular disclosure of information pertaining to auction market preferred securities, including liquidation preference, liquidation value, par value, rate setting interval, redemption requirements, dividend distributions, roll forward of shares outstanding, shares authorized, aggregate value of auction market preferred securities, variable interest rate earned, and other information necessary to a fair presentation. If redeemable, the auction market preferred securities are redeemable solely at the option of the issuer.

(For last 10-K submitted to SEC as of March 31, 2018)

Entity Disclosure