EXHIBIT 2

CUSIP No. 269279402

AGREEMENT CONCERNING JOINT FILING

OF SCHEDULE 13G/A

The undersigned agree as follows:

(i) each of them is individually eligible to use the Schedule 13G/A to which this Exhibit is attached, and such Schedule 13G/A is filed on behalf of each of them; and

(ii) each of them is responsible for the timely filing of such Schedule 13G/A and any amendments thereto, and for the completeness and accuracy of the information concerning such person contained therein; but none of them is responsible for the completeness or accuracy of the information concerning the other person making the filing, unless such person knows or has reason to believe that such information is inaccurate.

This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all of which, taken together, shall constitute one and the same instrument.

Dated: February 14, 2018

V. PREM WATSA
/s/ V. Prem Watsa
THE ONE ONE ZERO NINE HOLDCO LIMITED
By:	/s/ V. Prem Watsa
	Name: V. Prem Watsa
	Title: President
THE SIXTY TWO INVESTMENT COMPANY LIMITED
By:	/s/ V. Prem Watsa
	Name: V. Prem Watsa
	Title: President

FAIRFAX FINANCIAL HOLDINGS LIMITED
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: President
FFHL GROUP LTD.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Director
FAIRFAX (US) INC.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
ZENITH NATIONAL INSURANCE COMPANY
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
ZENITH INSURANCE COMPANY (U.S. ENTITY)
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G

TIG INSURANCE COMPANY
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
ODYSSEY US HOLDINGS INC.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
ODYSSEY RE HOLDINGS CORP.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
ODYSSEY REINSURANCE COMPANY
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
CLEARWATER SELECT INSURANCE COMPANY
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G

NEWLINE HOLDINGS UK LIMITED
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
NEWLINE CORPORATE NAME LIMITED
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
CRUM & FORSTER HOLDINGS CORP.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
UNITED STATES FIRE INSURANCE COMPANY
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G

NORTHBRIDGE FINANCIAL CORPORATION
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
NORTHBRIDGE GENERAL INSURANCE CORPORATION
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
NORTHBRIDGE PERSONAL INSURANCE CORPORATION
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
FEDERATED INSURANCE COMPANY OF CANADA
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G

FAIRFAX (BARBADOS) INTERNATIONAL CORP.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
TIG INSURANCE (BARBADOS) LIMITED
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G
WENTWORTH INSURANCE COMPANY LTD.
By:	/s/ Paul Rivett
	Name: Paul Rivett
	Title: Attorney-in-Fact pursuant to Power of Attorney attached to this Schedule 13G

RIVERSTONE HOLDINGS LIMITED
By:	/s/ Nicholas C. Bentley
	Name: Nicholas C. Bentley
	Title: Managing Director
RIVERSTONE INSURANCE LIMITED
By:	/s/ Nicholas C. Bentley
	Name: Nicholas C. Bentley
	Title: Director

ZENITH INSURANCE COMPANY (CANADIAN ENTITY)
By:	/s/ Paula Sawyers
	Name: Paula Sawyers
	Title: Senior Vice President and General Counsel

ADVENT CAPITAL (HOLDINGS) LTD.
By:	/s/ Neil Murdoch Ewing
	Name: Neil Murdoch Ewing
	Title: Company Secretary
ADVENT CAPITAL (NO. 3) LIMITED
By:	/s/ Neil Murdoch Ewing
	Name: Neil Murdoch Ewing
	Title: Company Secretary

BRIT LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Chief Financial Officer and Director
BRIT INSURANCE HOLDINGS LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Chief Financial Officer and Director
BRIT SYNDICATES LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Chief Financial Officer and Director
BRIT REINSURANCE (BERMUDA) LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Director