Retirement Benefit Arrangements (Tables)

12 Months Ended

Dec. 31, 2012

Disclosure - Retirement Benefit Arrangements [Abstract]

Funded status of Zurich plan

		2012		2011
Funded status
Unfunded pension obligation at beginning of year	$	25,162	$	17,144
Change in pension obligation
Service cost		6,474		7,141
Interest cost		2,976		3,308
Plan participants’ contributions		1,998		2,174
Actuarial loss		7,046		8,470
Plan amendments		(707)		0
Benefits paid		(8,582)		(248)
Foreign currency adjustments		4,349		(850)
Settlements		0		(13,178)
Change in pension obligation		13,554		6,817
Change in fair value of plan assets
Actual return on plan assets		3,782		3,610
Employer contributions		5,941		6,627
Plan participants’ contributions		1,998		2,174
Benefits paid		(8,582)		(248)
Foreign currency adjustments		3,315		(186)
Settlements		0		(13,178)
Change in fair value of plan assets		6,454		(1,201)
Funded status
Unfunded pension obligation at end of year	$	32,262	$	25,162
Additional information:
Projected benefit obligation at end of year	$	134,710	$	121,156
Accumulated pension obligation at end of year		129,492		116,904
Fair value of plan assets at end of year		102,448		95,994

Assumptions used

	2012					2011					2010
		Pension		Net periodic			Pension		Net periodic			Pension		Net periodic
		obligation		benefit cost			obligation		benefit cost			obligation		benefit cost
Discount rate		1.75	%	2.5	%		2.5	%	2.75	%		2.75	%	3.25	%
Expected return on plan assets		0		2.5			0		3.0			0		3.6
Rate of compensation increase		2.5		3.5			3.5		3.5			3.5		3.5

Expected future benefit payments

Period		Amount
2013	$	4,435
2014		4,567
2015		4,939
2016		5,030
2017		4,890
2018 to 2022		27,177