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Employee Benefit Plans (Details Textual) (USD $) | 1 Months Ended | 12 Months Ended
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Jan. 31, 2012 | Jul. 31, 2011 | Oct. 31, 2010 | Dec. 31, 2012 Employees | Dec. 31, 2011 Employees
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Contribution\charges to the Company plans |  |  |  | $ 4,107,000 | $ 3,979,000
Employee Benefit Plans (Additional Textual) [Abstract] |  |  |  |  |
Pension benefit calculation description |  |  |  | highest five-year average compensation within ten years before retirement |
Highest average compensation period |  |  |  | 5 years |
Unrecognized actuarial loss included in accumulated comprehensive income |  |  |  | 19,073,000 |
Actuarial losses to be recognized in net periodic benefit costs |  |  |  | 847,000 |
Employers matching contribution, percentage | 3.00% | 2.00% | 1.00% |  |
Number of employees participating in medical plan |  |  |  | 702 | 715
The Defined Contribution Plan [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Contribution\charges to the Company plans |  |  |  | 908,000 | 446,000
Non-US Employees Defined Benefit Plan [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Expenses related to defined benefit and contribution plan during year |  |  |  | 200,000 | 262,000
Equity securities [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Target plan asset allocations range, minimum |  |  |  | 0.00% |
Target plan asset allocations range, maximum |  |  |  | 55.00% |
Fixed income securities [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Target plan asset allocations range, minimum |  |  |  | 35.00% |
Target plan asset allocations range, maximum |  |  |  | 100.00% |
Non Traditional Securities [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Target plan asset allocations range, minimum |  |  |  | 0.00% |
Target plan asset allocations range, maximum |  |  |  | 10.00% |
Maximum [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Maximum period allocated for calculating average compensation |  |  |  | 10 years |
Estimated contributions expected to be paid to plans during 2013 |  |  |  | 800,000 |
Minimum [Member] |  |  |  |  |
Employee Benefit Plans (Textual) [Abstract] |  |  |  |  |
Estimated contributions expected to be paid to plans during 2013 |  |  |  | $ 600,000 |

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- Definition Defined benefit plan accumulated other comprehensive income unrecognized actuarial loss. + References No definition available. + Details
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- Definition Defined benefit plan highest average compensation period. + References No definition available. + Details
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- Definition Defined benefit plan maximum period allocated for calculating average compensation. + References No definition available. + Details
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- Definition Defined benefit plan net periodic benefit costs actuarial losses expected to be recognized. + References No definition available. + Details
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- Definition Defined benefit plan pension benefit calculation description. + References No definition available. + Details
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- Details
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- Details
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- Definition Amount of plan administration expenses deducted from total plan assets. + References No definition available. + Details
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- Definition Amount of benefits expected to be paid in the next rolling twelve months following the latest balance sheet presented from a defined benefit plan. + References No definition available. + Details
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- Definition Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis. + 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 (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis. + 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 (d)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (c)(i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e2446-114920 + Details
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- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6414718&loc=d3e28014-114942 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 11 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + 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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- Definition Number of employees eligible to participate in the defined contribution plan or plans described. + References No definition available. + Details
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