Employee Benefit Plans (Details) (USD $)	3 Months Ended
	Mar. 31, 2014
Change in Plan Assets [Roll Forward]
Discount rate	4.60%
Expected long-term return on plan assets	5.90%
Estimated Future Pension Benefit Payments [Abstract]
Defined Benefit Plan, Estimated Future Employer Contributions in Current Fiscal Year, Description	During the second quarter of 2012, the Company adopted a payment plan with the trustees of the defined benefit plan, in which the Company will pay approximately ₤2 million GBP (approximately $3 million based on a USD:GBP exchange rate of 1.6:1) every year from 2012 through 2019. As part of the required pension review, which occurs every three years under the United Kingdom pension regulations, the Company is currently in discussions with trustees regarding future contributions for the pension scheme.
Defined Benefit Plan, Expected Future Benefit Payments in Year One	$ 3,000,000
Defined Benefit Plan, Expected Future Benefit Payments in Year Two	3,000,000
Defined Benefit Plan, Expected Future Benefit Payments in Year Three	3,000,000
Defined Benefit Plan, Expected Future Benefit Payments in Year Four	3,000,000
Defined Benefit Plan, Expected Future Benefit Payments in Year Five	3,000,000
Defined Benefit Plan, Expected Future Benefit Payments in Three Fiscal Years Thereafter	3,000,000
Employee Benefit Plans Additional Information [Abstract]
Net period benefit costs	0
Deferred Compensation Plan Assets	4,000,000
Defined Benefit Plans, General Information	The Company has a contributory defined benefit plan that covers certain employees in the United Kingdom (“U.K.”). The net pension and supplemental retirement benefit obligations and the related periodic costs are based on, among other things, assumptions regarding the discount rate, estimated return on plan assets and mortality rates. These obligations and related periodic costs are measured using actuarial techniques and assumptions.
Defined Benefit Plan, Pension, Method to Determine Vested Benefit Obligation	The projected unit credit method is the actuarial cost method used to compute the pension liabilities and related expenses.
Deferred Compensation Arrangements, Overall, Description	The Company maintains a Non-Qualified Deferred Compensation Plan (the “Deferred Compensation Plan”) for executive officers, key employees and members of the Board of Directors (the “Board”). The Deferred Compensation Plan allows eligible participants to defer the receipt of eligible compensation, including equity awards, until designated future dates. The Company offsets its obligations under the Deferred Compensation Plan by investing in the actual underlying investments. These investments are classified as trading securities and are carried at fair value. At March 31, 2014, these investments totaled approximately $4 million. All gains and losses in these investments are materially offset by corresponding gains and losses in the Deferred Compensation Plan liabilities
Pension Plans, Defined Benefit [Member]
Change in Benefit Obligation [Roll Forward]
Benefit obligation - beginning	149,316,000
Service cost	83,000
Interest cost	1,710,000
Actuarial gain	(1,128,000)
Benefits paid	(1,077,000)
Currency changes	993,000
Benefit obligation - ending	149,897,000
Change in Plan Assets [Roll Forward]
Fair value of plan assets - beginning	116,568,000
Actual return	1,582,000
Employer contribution	331,000
Benefits paid	(1,077,000)
Currency changes	784,000
Fair value of plan assets - ending	118,188,000
Funded status	$ (31,709,000)
Weighted average discount rate benefit obligations	4.60%
Estimated Future Pension Benefit Payments [Abstract]
USD:GBP exchange rate	0.625