Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2012

Defined Benefit Pension Plans

Defined benefit plans disclosure

Schedule of components of net periodic benefit cost and assumptions used to determine net periodic benefit cost

	United Kingdom Plans									German Plan
	2012			2011			2010			2012			2011			2010
Components of Net Periodic Pension Cost:
Service cost	$	4,172		$	4,296		$	3,682		$	670		$	869		$	754
Interest cost		7,734			8,388			7,718			642			610			584
Expected return on plan assets		(10,319	)		(10,569	)		(8,996	)		—			—			—
Amortization of net actuarial loss		1,172			1,344			1,249			—			116			74
Expected participant contributions		(1,838	)		(1,871	)		(2,074	)		—			—			—
Net periodic pension cost	$	921		$	1,588		$	1,579		$	1,312		$	1,595		$	1,412
Assumptions Used to Determine Net Periodic Pension Cost:
Discount rate		4.60	%		5.20	%		5.75	%		5.40	%		4.60	%		5.50	%
Expected rate of return on assets		5.90	%		6.50	%		6.75	%		n/a			n/a			n/a
Salary increases		4.00	%		4.50	%		4.50	%		2.50	%		2.50	%		3.00	%

Schedule of projected benefit obligation, plan assets and the funded status of the plan

	United Kingdom Plans						German Plan
	2012			2011			2012			2011
Change in Projected Benefit Obligation:
Benefit obligation, beginning of year	$	167,711		$	156,604		$	12,810		$	12,562
Service cost		4,172			4,296			670			869
Interest cost		7,734			8,388			642			610
Actuarial (gain) loss		(2,389	)		(1,138	)		3,991			(1,025	)
Curtailment gain		—			—			(657	)		—
Benefits paid		(2,525	)		(2,348	)		(132	)		(141	)
Foreign currency exchange rate changes		6,291			1,909			304			(65	)
Benefit obligation, end of year	$	180,994		$	167,711		$	17,628		$	12,810
Change in Fair Value of Assets:
Fair value of plan assets, beginning of year	$	170,413		$	153,684		$	—		$	—
Covance contributions		6,369			6,556			—			—
Employee contributions		1,838			1,871			—			—
Actual return on plan assets		13,125			8,911			—			—
Benefits paid		(2,525	)		(2,348	)		—			—
Foreign currency exchange rate changes		6,697			1,739			—			—
Fair value of plan assets, end of year	$	195,917		$	170,413		$	—		$	—
Funded status at end of year—over (under) funded	$	14,923		$	2,702		$	(17,628	)	$	(12,810	)

Schedule of amounts reported in the consolidated balance sheets

	United Kingdom Plans				German Plan
	2012		2011		2012			2011
Amounts recognized in the consolidated balance sheets:
Non-current assets	$	14,923	$	2,702	$	—		$	—
Current liabilities		—		—		(204	)		(184	)
Non-current liabilities		—		—		(17,424	)		(12,626	)
Total	$	14,923	$	2,702	$	(17,628	)	$	(12,810	)

Schedule of amounts recognized in accumulated other comprehensive income and not yet recognized as a component of net periodic pension cost

	United Kingdom Plans						German Plan
	2012			2011			2012			2011
Net actuarial loss	$	33,039		$	40,054		$	5,146		$	1,839
Less: Tax benefit (deferred tax asset)		(8,780	)		(10,722	)		(1,583	)		(558	)
Accumulated other comprehensive income impact	$	24,259		$	29,332		$	3,563		$	1,281

Schedule of weighted average assumptions used to determine benefit obligations

	United Kingdom Plans						German Plan
	2012			2011			2012			2011
Assumptions Used to Determine Benefit Obligations:
Discount rate		4.60	%		4.60	%		3.50	%		5.40	%
Salary increases		3.60	%		4.00	%		2.00	%		2.50	%

Schedule of expected benefit payments

Year Ending December 31,	United Kingdom Plans		German Plan
2013	$	3,067	$	204
2014	$	3,421	$	224
2015	$	3,955	$	239
2016	$	3,606	$	261
2017	$	4,196	$	274
2018-2022	$	29,715	$	1,492

United Kingdom Defined Benefit Pension Plans

Defined benefit plans disclosure

Schedule of target range of asset allocation

Equity securities	40%–50%
Debt securities	40%–50%
Real estate	5%–10%
Other	0%–5%

Schedule of weighted average asset allocation by asset category

	2012			2011
Equity securities		46	%		48	%
Debt securities		46	%		42	%
Real estate		5	%		5	%
Other		3	%		5	%
Total		100	%		100	%

Schedule of fair value of plan assets by asset category

	Total		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Cash	$	53	$	53	$	—	$	—
Mutual funds(a)		195,864		—		195,864		—
Total	$	195,917	$	53	$	195,864	$	—

(a)

Mutual funds represent pooled investment vehicles offered by investment managers, which are generally comprised of investments in equities, bonds, property and cash. The plans' trustees hold units in these funds, the value of which is determined by the number of units held multiplied by the unit price calculated by the investment managers. That unit price is derived based on the market value of the securities that comprise the fund, which are determined by quoted prices in active markets. No element of the valuation is based on inputs made by the plans' trustees.

Supplemental Executive Retirement Plan

Defined benefit plans disclosure

Schedule of components of net periodic benefit cost and assumptions used to determine net periodic benefit cost

	2012			2011			2010
Components of Net Periodic Pension Cost:
Service cost	$	1,478		$	1,282		$	1,391
Interest cost		776			695			693
Amortization of prior service credit		(119	)		(119	)		(119	)
Amortization of net actuarial loss		270			296			226
Net periodic pension cost	$	2,405		$	2,154		$	2,191
Assumptions Used to Determine Net Periodic Pension Cost:
Discount rate		4.30	%		4.40	%		5.25	%
Salary increases		3.75	%		4.00	%		4.00	%

Schedule of projected benefit obligation, plan assets and the funded status of the plan

	2012			2011
Change in Projected Benefit Obligation:
Benefit obligation, beginning of year	$	16,572		$	14,525
Service cost		1,478			1,282
Interest cost		776			695
Actuarial loss		2,289			70
Benefit obligation, end of year	$	21,115		$	16,572
Funded status at end of year—under funded	$	(21,115	)	$	(16,572	)

Schedule of amounts reported in the consolidated balance sheets

	2012			2011
Amounts recognized in the consolidated balance sheets:
Current liabilities	$	(2,486	)	$	—
Non-current liabilities		(18,629	)		(16,572	)
Total	$	(21,115	)	$	(16,572	)

Schedule of amounts recognized in accumulated other comprehensive income and not yet recognized as a component of net periodic pension cost

	2012			2011
Net actuarial loss	$	6,011		$	3,992
Prior service credit		(689	)		(808	)
Less: Tax benefit (deferred tax asset)		(1,879	)		(1,124	)
Accumulated other comprehensive income impact	$	3,443		$	2,060

Schedule of weighted average assumptions used to determine benefit obligations

	2012			2011
Assumptions Used to Determine Benefit Obligation:
Discount rate		3.20	%		4.30	%
Salary increases		3.25	%		3.75	%

Schedule of expected benefit payments

Year Ending December 31,
2013	$	2,486
2014	$	1,172
2015	$	130
2016	$	10,253
2017	$	1,278
2018-2022	$	7,000

Post-Employment Retiree Health and Welfare Plan

Defined benefit plans disclosure

Schedule of components of net periodic benefit cost and assumptions used to determine net periodic benefit cost

	2012			2011			2010
Components of Net Periodic Post-retirement Benefit Cost:
Service cost	$	69		$	96		$	108
Interest cost		290			306			314
Amortization of net actuarial loss		40			133			33
Net periodic post-retirement benefit cost	$	399		$	535		$	455
Assumptions Used to Determine Net Periodic Post-retirement Benefit Cost:
Discount rate		4.60	%		4.70	%		5.25	%
Health care cost trend rate		8.00%	(a)		8.50	%		7.50	%

(a) decreasing to ultimate trend of 5.00% in 2018

Schedule of projected benefit obligation, plan assets and the funded status of the plan

	2012			2011
Change in Projected Benefit Obligation:
Benefit obligation, beginning of year	$	6,540		$	6,224
Service cost		69			96
Interest cost		290			306
Participant contributions		774			667
Actuarial (gain) loss		(114	)		179
Benefits paid		(912	)		(1,004	)
Federal subsidy on benefits paid		170			72
Benefit obligation, end of year	$	6,817		$	6,540
Funded status at end of year—under funded	$	(6,817	)	$	(6,540	)

Schedule of amounts reported in the consolidated balance sheets

	2012			2011
Amounts recognized in the consolidated balance sheets:
Current liabilities	$	(607	)	$	(614	)
Non-current liabilities		(6,210	)		(5,926	)
Total	$	(6,817	)	$	(6,540	)

Schedule of amounts recognized in accumulated other comprehensive income and not yet recognized as a component of net periodic pension cost

	2012			2011
Net actuarial loss	$	678		$	832
Less: Tax benefit (deferred tax asset)		(239	)		(294	)
Accumulated other comprehensive income impact	$	439		$	538

Schedule of weighted average assumptions used to determine benefit obligations

	2012			2011
Assumptions Used to Determine Benefit Obligation:
Discount rate		3.60	%		4.60	%
Health care cost trend rate		7.50	%(a)		8.00	%

(a) decreasing to ultimate trend of 5.00% in 2017.

Schedule of expected future gross benefit payments, federal subsidies and net benefit payments

Year Ending December 31,	Gross Benefit Payments		Federal Subsidies			Net Benefit Payments
2013	$	1,461	$	(127	)	$	1,334
2014	$	1,513	$	(135	)	$	1,378
2015	$	1,687	$	—		$	1,687
2016	$	1,713	$	—		$	1,713
2017	$	1,742	$	—		$	1,742
2018-2022	$	8,077	$	—		$	8,077