Share Based Compensation Plans (2012 LTIP Unit Option Activity) (Details) - Predecessor - Partnership 2012 Long Term Incentive Plans - Unit Options - USD ($)	8 Months Ended	12 Months Ended
	Aug. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Rights		The LTIP Committee determined the vesting and exercise restrictions applicable to an award of options, if any, and the method by which the exercise price may be paid by the Participant. Unit option awards expired 10 years from the date of grant.
Years From Date Of Grant Unit Option Awards Expire		10 years
Outstanding, beginning of year (Units)	1,354,525	1,354,525	1,458,300	1,482,675
Granted (Units)	0		0	0
Exercised (Units)	0		0	0
Forfeited (Units)	40,689		103,775	24,375
Outstanding, end of period (Units)	0		1,354,525	1,458,300
General and Administrative Expense
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Non-cash compensation expense recognized	$ 31,000		$ 800,000	$ 1,700,000