Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares shares in Millions	Mar. 31, 2016	Dec. 31, 2015
Class A limited partners, par or assigned value (in dollars per share)	$ 0	$ 0
Class A limited partners, units authorized (in shares)	11.1	11.1
Class A limited partners, units issued (in shares)	11.1	11.1
Class A limited partners, units outstanding (in shares)	11.1	11.1