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 10, 2011

TRIDENT II, L.P. By:  Trident Capital II, L.P., its sole general partner By:  CD Trident II, LLC, a general partner
By:	/s/ David J. Wermuth
	Name:	David J. Wermuth
	Title:	Vice President
TRIDENT CAPITAL II, L.P. By:  CD Trident II, LLC, a general partner
By:	/s/ David J. Wermuth
	Name:	David J. Wermuth
	Title:	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:	David J. Wermuth
	Title:	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