CONSOLIDATED BALANCE SHEETS (Parenthetical) - shares	Dec. 31, 2016	Dec. 31, 2015
Voting units
Members’ equity:
Members' equity units, authorized (in units)	100	100
Members' equity units, issued (in units)	100	100
Members' equity units, outstanding (in units)	100	100
Non-voting units
Members’ equity:
Members' equity units, authorized (in units)	100	100
Members' equity units, issued (in units)	100	100
Members' equity units, outstanding (in units)	100	100