Goodwill and Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2013

Goodwill And Intangible Assets [Abstract]

Schedule Of Goodwill And Intangible Assets Rollforward [Table Text Block]

				Definite-		Indefinite-
				lived intangible		lived intangible		Total
2013		Goodwill		assets		asset	intangible assets
Balance at January 1	$	456,380	$	206,920	$	7,350	$	214,270
Intangible assets amortization		0		(27,180)		0		(27,180)
Balance at December 31	$	456,380	$	179,740	$	7,350	$	187,090
				Definite-		Indefinite-
				lived intangible		lived intangible		Total
2012		Goodwill		assets		asset	intangible assets
Balance at January 1	$	455,533	$	126,517	$	7,350	$	133,867
Acquired during the year		847		112,202		0		112,202
Intangible assets amortization		0		(31,799)		0		(31,799)
Balance at December 31	$	456,380	$	206,920	$	7,350	$	214,270

Schedule Of Definite And Indefinite Lived Intangible Assets [Table Text Block]

		2013				2012
			Gross carrying		Accumulated		Gross carrying		Accumulated
			value		amortization		value		amortization
Definite-lived intangible assets:
	Unpaid losses and loss expenses	$	191,196	$	115,958	$	191,196	$	96,478
	Renewal rights		80,863		38,132		80,863		32,700
	Customer relationships		63,408		1,637		63,408		0
	Fronting arrangements		631		631		631		0
Total definite-lived intangible assets		$	336,098	$	156,358	$	336,098	$	129,178
Indefinite-lived intangible asset:
	U.S. insurance licenses		7,350		n/a		7,350		n/a
Total intangible assets		$	343,448	$	156,358	$	343,448	$	129,178

Allocation of Goodwill by Segment [Table Text Block]

			Amount
Non-life segment:
	North America	$	82,026
	Global (Non-U.S.) P&C		149,895
	Global Specialty		179,641
	Catastrophe		26,014
Life and Health segment			18,804
Total goodwill		$	456,380

Schedule Of Expected Amortization Expense [Table Text Block]

Year		Amount
2014	$	27,486
2015		26,593
2016		25,919
2017		22,818
2018		21,247
Total	$	124,063