Subsequent Events (Details) - USD ($) $ in Millions	6 Months Ended
Jun. 30, 2018	Jul. 25, 2018
Subsequent Event [Line Items]
Centerbridge ownership percentage of Holdings	99.70%
Subsequent Event
Subsequent Event [Line Items]
Cash payment to Mr. Monson		$ 5.5

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Period Type:	duration