Acquisitions, Dispositions and Goodwill (Tables)

9 Months Ended

Sep. 30, 2012

Acquisitions Dispositions And Goodwill [Abstract]

Goodwill balances by reportable segments

	U.S. Property		Professional		Accident &		U.S. Surety
	& Casualty		Liability		Health		& Credit		International		Total
Balance at beginning of year	$	223,000	$	301,547	$	144,132	$	79,700	$	124,435	$	872,814
Earnout and other		0		12,542		(19)		0		523		13,046
Balance at September 30, 2012	$	223,000	$	314,089	$	144,113	$	79,700	$	124,958	$	885,860