EXHIBIT 2

CUSIP No. 46121Y102

AGREEMENT CONCERNING JOINT FILING

OF SCHEDULE 13G

The undersigned agree as follows:

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

(ii) each of them is responsible for the timely filing of such Schedule 13G 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: May 11, 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
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

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 REINSURANCE (BERMUDA) LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Director

BRIT SYNDICATES LIMITED
By:	/s/ Mark Allan
	Name: Mark Allan
	Title: Chief Financial Officer and Director