EXHIBIT A

Joint Filing Agreement

By this Agreement, the undersigned agree that this Statement on Schedule 13D being filed on or about this date, and any subsequent amendments thereto filed by any of us, with respect to the Class A Common Stock of the Issuer is being filed on behalf of each of us.

Dated: February 16, 2017

2007 CO-INVESTMENT PORTFOLIO L.P.
By its general partner, STEPSTONE CO-INVESTMENT FUNDS GP, LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel
STEPSTONE CAPITAL PARTNERS II ONSHORE, L.P.
By its general partner, STEPSTONE CO-INVESTMENT FUNDS GP, LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel
STEPSTONE CAPITAL PARTNERS II CAYMAN HOLDINGS, L.P.
By its general partner, STEPSTONE CO-INVESTMENT FUNDS GP, LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel
STEPSTONE CO-INVESTMENT FUNDS LP, LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel
STEPSTONE GROUP LP
By its general partner, STEPSTONE GROUP HOLDINGS LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel
STEPSTONE GROUP HOLDINGS LLC
By:	/s/ Jason Ment
Name:	Jason Ment
Title:	Partner and General Counsel

20