Exhibit B

JOINT FILING AGREEMENT

The undersigned agree that the statement on Schedule 13G/A to which this exhibit is attached is filed on behalf of each of them in capacities set forth below.

Dated: February 5, 2008

TRIDENT II, L.P.
By:	Trident Capital II, L.P., its sole general partner
By:	CD Trident II, LLC, a general partner
	By: Name: Title:	/s/ David J. Wermuth David J. Wermuth Vice President
TRIDENT CAPITAL II, L.P.
By:	CD Trident II, LLC, a general partner
	By:	/s/ David J. Wermuth
	Name: Title:	David J. Wermuth Vice President
STONE POINT CAPITAL LLC
	By:	/s/ David J. Wermuth
	Name:	David J. Wermuth
	Title:	Principal
MARSH & MCLENNAN CAPITAL PROFESSIONALS FUND, L.P.
By:	Stone Point GP Ltd., its sole general partner
	By:	/s/ David J. Wermuth
	Name: Title:	David J. Wermuth Secretary
MARSH & MCLENNAN EMPLOYEES’ SECURITIES COMPANY, L.P.
By:	Marsh & McLennan GP I, Inc., its sole general partner
By:	Stone Point Capital LLC, agent/attorney-in-fact
	By:	/s/ David J. Wermuth
	Name:	David J. Wermuth
	Title:	Principal