Subsequent Events	9 Months Ended
	Sep. 30, 2019
Subsequent Events [Abstract]
Subsequent Events	SUBSEQUENT EVENTOn November 5, 2019, we filed with the SEC a registration statement on Form S-4 (the Registration Statement) and plan to commence an offer to exchange (the Exchange Offer) any and all of our existing 6.625% Senior Subordinated Notes due 2021 (CUSIP No. 909218AB5) (the Notes) for new Second Lien Senior Secured Notes (the New Notes), on the terms and conditions in the Registration Statement. The Exchange Offer is conditioned on either (i) the consummation of an amendment to the Unit credit agreement or (ii) a refinancing or replacement of the Unit credit agreement with a credit facility, in each case that, among other things, permits the issuance of the New Notes, the incurrence of guarantees of the New Notes and the grant of liens securing the New Notes, which condition will not be waived. In connection with the Exchange Offer, we will be soliciting consents from the holders of the Notes to eliminate substantially all of the restrictive covenants from the 2011 Indenture, modify or eliminate certain other provisions in the 2011 Indenture and waive any existing defaults and events of default under the 2011 Indenture as provided in the Registration Statement (the Consent Solicitation). The Exchange Offer has not commenced, and the descriptions of the Exchange Offer herein do not constitute an offer to buy, nor will there be any exchange of the New Notes, other than under the Registration Statement.