Related Party Transactions (Details)	Jun. 30, 2017	Aug. 07, 2012
Controlling shareholder | Everest Hill Group
Related party transactions
Percentage ownership by related party	49.90%
QMI | QMT
Related party transactions
Percentage ownership of membership interests		74.00%
QMI | Controlling shareholder | Everest Hill Group
Related party transactions
Percentage ownership by related party	100.00%