Exhibit 99.1

JOINT FILING AGREEMENT

PURSUANT TO RULE 13d-1(k)(1)

The undersigned acknowledge and agree that the foregoing statement on Schedule 13G is filed on behalf of each of the undersigned and that all subsequent amendments to this statement on Schedule 13G shall 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 it contained therein, but shall not be responsible for the completeness and accuracy of the information concerning the others, except to the extent that it knows or has reason to believe that such information is inaccurate. This Agreement may be executed in any number of counterparts and all of such counterparts taken together shall constitute one and the same instrument.

Dated: February 14, 2017

[Signature Pages Follow]

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ONYX GEM INVESTMENT HOLDINGS LIMITED
By:	/s/ Tara E. O’Neill
	Name: Tara E. O’Neill
	Title: Director

ONYX GEM GROUP LIMITED
By:	/s/ Tara E. O’Neill
	Name: Tara E. O’Neill
	Title: Director

ZEBRA CO-INVEST LP
By:	Cayman Zebra Holdings GP Ltd., its general partner
By:	/s/ Tara E. O’Neill
	Name: Tara E. O’Neill
	Title: Director

WARBURG PINCUS PRIVATE EQUITY XI, L.P.
By:	Warburg Pincus XI, L.P., its general partner
By:	WP Global LLC, its general partner
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

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WARBURG PINCUS PRIVATE EQUITY XI-B, L.P.
By:	Warburg Pincus XI, L.P., its general partner
By:	WP Global LLC, its general partner
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WARBURG PINCUS PRIVATE EQUITY XI-C, L.P.
By:	Warburg Pincus (Cayman) XI, L.P., its general partner
By:	Warburg Pincus XI-C, LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

WP XI Partners, L.P.
By:	Warburg Pincus XI, L.P., its general partner
By:	WP Global LLC, its general partner
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

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WARBURG PINCUS XI PARTNERS, L.P.
By:	Warburg Pincus XI, L.P., its general partner
By:	WP Global LLC, its general partner
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WARBURG PINCUS LLC
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Managing Director

WARBURG PINCUS XI, L.P.
By:	WP Global LLC, its general partner
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WP GLOBAL LLC
By:	Warburg Pincus Partners II, L.P., its managing member
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WARBURG PINCUS PARTNERS II, L.P.
By:	Warburg Pincus Partners GP LLC, its general partner
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

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WARBURG PINCUS PARTNERS GP LLC
By:	Warburg Pincus & Co., its managing member
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WARBURG PINCUS & CO.
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Partner

WARBURG PINCUS (CAYMAN) XI, L.P.
By:	Warburg Pincus XI-C, LLC, its general partner
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

WARBURG PINCUS XI-C, LLC
By:	Warburg Pincus Partners II (Cayman), L.P., its managing member
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

WARBURG PINCUS (BERMUDA) XI, LTD.
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

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WARBURG PINCUS PARTNERS II (CAYMAN), L.P.
By:	Warburg Pincus (Bermuda) Private Equity GP Ltd., its general partner
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

WARBURG PINCUS (BERMUDA) PRIVATE EQUITY GP LTD.
By:	/s/ Robert B. Knauss
	Name: Robert B. Knauss
	Title: Authorised Signatory

CAYMAN ZEBRA HOLDINGS GP LTD.
By:	/s/ Tara E. O’Neill s
	Name: Tara E. O’Neill
	Title: Director

CHARLES R. KAYE
By:	/s/ Robert B. Knauss l
	Robert B. Knauss, Attorney-in-fact*

JOSEPH P. LANDY
By:	/s/ Robert B. Knauss
	Robert B. Knauss, Attorney-in-fact*

* The Power of Attorney given by each of Mr. Kaye and Mr. Landy was previously filed with the U.S. Securities and Exchange Commission on July 12, 2016 as an exhibit to the statement on Schedule 13D filed by Warburg Pincus LLC with respect to WEX Inc. and is hereby incorporated by reference.

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