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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

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- Definition

A narrative description of investment policies and strategies, including target allocation percentages or range of percentages considering the major categories of plan assets as of the latest statement of financial position presented (on a weighted-average basis for employers with more than one plan), and other factors that are pertinent to an understanding of those policies and strategies such as investment goals, risk management practices, allowable and prohibited investment types including the use of derivatives, diversification, and the relationship between plan assets and benefit obligations. For investment funds disclosed as major categories, the narrative description would be expected to also include a description of the significant investment strategies of those funds.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

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- Definition

A description of the investment strategies for any investment fund investments by the Plan which are considered and disclosed as a major investment category by the Plan.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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- Definition

This element represents the information provided by management related to the valuation techniques used to develop the fair value measurements of plan assets as of the date of the statement of financial position.

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- Definition

Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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-Publisher FASB

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-Topic 715

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

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Retirement Plans (Information About Plan Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Policies and Strategies Narrative Description	Plan assets consist primarily of various fixed income and equity investments. The Company's primary investment objective is to provide long-term growth of capital while accepting a moderate level of risk. The investments are limited to cash and equivalents, bonds, preferred stocks and common stocks. The investment target ranges and actual allocation of pension plan assets by major category at December 31, 2013 and 2012 are as follows
Defined Benefit Plan, Actual Plan Asset Allocations	100.00%	100.00%
Defined Benefit Plan, Plan Assets at Fair Value, Valuation Techniques	In accordance with the fair value disclosure requirements with FASB ASC 820, "Fair Value Measurements and Disclosures," the following assets were measured at fair value on a recurring basis at December 31, 2013 and 2012. Additional information regarding FASB ASC 820 and the fair value hierarchy can be found in Note 19, Fair Value Measurements
Fair value of plan assets	$ 15,039	$ 13,262	$ 12,088
United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,769	6,051	5,160
Cash and Cash Equivalents [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Cash and cash equivalents
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	0.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	10.00%
Defined Benefit Plan, Actual Plan Asset Allocations	4.00%	7.00%
Fair value of plan assets	568	984
Cash and Cash Equivalents [Member] \| United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Cash
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	100.00%
Fair value of plan assets	369	520
Fixed Income Funds [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Total fixed income funds
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	25.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	50.00%
Defined Benefit Plan, Actual Plan Asset Allocations	27.00%	31.00%
Fair value of plan assets	4,005	4,168
Municipal Bonds [Member] \| United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	U.K. Government securities
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	50.00%
Fair value of plan assets	1,468	1,529
Corporate Bond Securities [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	4,005	4,168
Equity Funds [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Total mutual funds / equities
Defined Benefit Plan, Target Plan Asset Allocations Range Minimum	50.00%
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	70.00%
Defined Benefit Plan, Actual Plan Asset Allocations	69.00%	62.00%
Fair value of plan assets	10,466	8,110
Equity Funds [Member] \| United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Equity securities
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	100.00%
Fair value of plan assets	2,803	2,250
Mutual Funds [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,142	7,163
Asset Allocations, Common Stock [Member] \| United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,324	947
Commercial Property [Member] \| United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Investment Strategies, Investment Fund Category	Commercial property
Defined Benefit Plan, Target Plan Asset Allocations Range Maximum	50.00%
Fair value of plan assets	2,129	1,636
Alternatives [Member] \| United Kingdom Benefit Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		$ 116