Members Equity Partners Capital (Class B Preferred Units) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Mezzanine equity beginning balance	$ 172,111
Distributions	37,168
Total mezzanine equity	342,991	$ 172,111
Class B Preferred
Mezzanine equity beginning balance	172,111
Private placement of Class B Preferred Units		350,000
Discount	(87)	(191,901)
Amortization of discount	23,477	6,594
Distributions	39,375	7,418
Distributions paid	(37,168)
Transfer embedded derivative to Class B	145,283
Total mezzanine equity	$ 342,991	$ 172,111