Defined benefit plan contributions by employer for foreign employees.

No definition available.

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- Definition

Maximum percentage of cash bonuses for contribution in compensation plan.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of current compensation of employee to contribute in plan.

+ References

No definition available.

+ Details

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- Definition

Maximum percentage of salary for contribution in compensation plan.

+ References

No definition available.

+ Details

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- Definition

Number of guaranteed annual payments.

+ References

No definition available.

+ Details

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- Definition

Period for receiving payments in annual Installments.

+ References

No definition available.

+ Details

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- Definition

Carrying amount as of the balance sheet date of amounts which could be received based on the terms of the insurance contract upon surrendering life policies owned by the entity.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 4

-Subparagraph (d)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6812-107765

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- Definition

The minimum period that the individual is required to perform services in order to be fully vested under the deferred compensation arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ 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 (a)

-URI http://asc.fasb.org/extlink&oid=28361610&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Projected Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6522206

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Accumulated Postretirement Benefit Obligation

-URI http://asc.fasb.org/extlink&oid=6503904

+ Details

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- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

+ Details

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- Definition

Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

+ References

No definition available.

+ Details

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Benefit Plans - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended	9 Months Ended
Benefit Plans - Additional Information (Detail) (USD $)	Sep. 30, 2013 Employee Benefit Plans [Member]	Sep. 30, 2012 Employee Benefit Plans [Member]	Sep. 30, 2013 Employee Benefit Plans [Member]	Sep. 30, 2012 Employee Benefit Plans [Member]	Sep. 30, 2013 Executive Deferred Compensation Plan [Member] Installment	Sep. 30, 2013 Executive Deferred Compensation Plan [Member]	Dec. 31, 2012 Executive Deferred Compensation Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Maximum percentage of current compensation of employee to contribute in plan			15.00%
Amount of company contribution in compensation	$ 140,000	$ 141,000	$ 434,000	$ 442,000
Company contributes to various retirement plans for foreign employees	65,000	54,000	189,000	156,000
Maximum percentage of salary for contribution in compensation plan						50.00%
Maximum percentage of cash bonuses for contribution in compensation plan						100.00%
Percent of matching cash						4.00%
Executive's continued service period						over three years
Period for receiving payments in annual Installments					15 years
Number of guaranteed annual payments					20
Deferred compensation obligation					1,800,000	1,800,000	1,700,000
Cash surrender value of policies					$ 1,800,000	$ 1,800,000	$ 1,600,000