Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2012

Goodwill And Intangible Assets [Abstract]

Schedule Of Goodwill And Intangible Assets Rollforward Table

				Definite-		Indefinite-
				lived intangible		lived intangible
2012		Goodwill		assets		asset		Total
Balance at January 1, 2012	$	455,533	$	126,517	$	7,350	$	589,400
Acquired during the year		847		112,202		0		113,049
Intangible assets amortization		0		(31,799)		0		(31,799)
Balance at December 31, 2012	$	456,380	$	206,920	$	7,350	$	670,650
				Definite-		Indefinite-
				lived intangible		lived intangible
2011		Goodwill		assets		asset		Total
Balance at January 1, 2011	$	455,533	$	171,365	$	7,350	$	634,248
Intangible assets amortization		0		(44,848)		0		(44,848)
Balance at December 31, 2011	$	455,533	$	126,517	$	7,350	$	589,400

Schedule Of Definite And Indefinite Lived Intangible Assets Table

		2012				2011
			Gross carrying		Accumulated		Gross carrying		Accumulated
			value		amortization		value		amortization
Definite-lived intangible assets:
	Unpaid losses and loss expenses	$	191,196	$	96,478	$	191,196	$	72,854
	Renewal rights		80,863		32,700		32,700		24,525
	Customer relationships		63,408		0		0		0
	Fronting arrangements		631		0		0		0
Total definite-lived intangible assets		$	336,098	$	129,178	$	223,896	$	97,379
Indefinite-lived intangible asset:
	U.S. insurance licenses		7,350		0		7,350		0
Total intangible assets		$	343,448	$	129,178	$	231,246	$	97,379

Allocation of Goodwill by Segment

			2012		2011
Non-life segment:
	North America	$	82,026	$	82,026
	Global (Non-U.S.) P&C		149,895		149,895
	Global (Non-U.S.) Specialty		179,641		179,641
	Catastrophe		26,014		26,014
Life segment			18,804		17,957
Total goodwill		$	456,380	$	455,533

Schedule Of Expected Amortization Expense

Period		Amount
2013	$	27,179
2014		27,486
2015		26,593
2016		25,919
2017		22,818
Total	$	129,995