EXHIBIT 99.1

JOINT FILING AGREEMENT

PURSUANT TO RULE 13d-1(k)

           The undersigned acknowledge and agree that the foregoing statement on Schedule 13D is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13D may be filed on behalf of each of the undersigned without the necessity of filing additional joint filing agreements.  The undersigned acknowledge that each shall be responsible for the timely filing of such amendments, and for the completeness and accuracy of the information concerning him or it contained herein or therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that he or it knows or has reason to believe that such information is inaccurate.

DATED:  January 25, 2016

GREENLIGHT CAPITAL, INC.
By:	/s/ Daniel Roitman
	Name:  Daniel Roitman
	Title:   Chief Operating Officer
DME ADVISORS GP, LLC
By:	/s/ Daniel Roitman
	Name:  Daniel Roitman
	Title:  Chief Operating Officer
DME ADVISORS, LP
By:	/s/ Daniel Roitman
	Name:  Daniel Roitman
	Title:   Chief Operating Officer
DME CAPITAL MANAGEMENT, LP
By:	/s/ Daniel Roitman
	Name:  Daniel Roitman
	Title:  Chief Operating Officer
/s/ Daniel Roitman
Daniel Roitman**, on behalf of David Einhorn