Basis of Presentation Cequent Spinoff (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	7 Months Ended	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2015	Jun. 30, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash distribution received from Cequent spin-off	$ 214,500	$ 214,500
Cequent Spin-off, one-time costs			$ 29,000	$ 30,000
Deferred Finance Costs, Net					$ 4,720	$ 6,050
Debt financing and extinguishment costs					$ 0	$ (1,970)	$ (3,360)
Discontinued Operations [Member]
Cequent Spin-off, one-time costs				18,000
Deferred Finance Costs, Net		9,000	9,000	9,000
Continuing Operations [Member]
Cequent Spin-off, one-time costs			3,000
Deferred Finance Costs, Net		$ 1,000	1,000	$ 1,000
Debt financing and extinguishment costs			$ 2,000