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Acquisitions (Details) (USD $) | 12 Months Ended |  | 1 Months Ended | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2013 | Dec. 31, 2012 | Jan. 31, 2014 ULSP [Member] | Dec. 31, 2013 LaserComp [Member] | Dec. 31, 2013 LaserComp [Member] Customer Relationships [Member] | Dec. 31, 2013 LaserComp [Member] Unpatented Technology [Member] | Dec. 31, 2013 ESS [Member] | Dec. 19, 2013 ESS [Member] | Dec. 31, 2013 ESS [Member] Unpatented Technology [Member] | Dec. 31, 2013 Nonlinear Dynamics [Member] | Aug. 07, 2013 Nonlinear Dynamics [Member] | Dec. 31, 2013 Scarabaeus [Member] | Jul. 31, 2013 Scarabaeus [Member] | Dec. 31, 2013 Scarabaeus [Member] Unpatented Technology [Member] | Dec. 31, 2013 Scarabaeus [Member] Software and Customer Relationships [Member] | Dec. 31, 2013 Acquisitions in 2013 [Member] | Dec. 31, 2011 Anter [Member] | Dec. 31, 2012 Baehr [Member] | Jan. 30, 2012 Baehr [Member] | Dec. 31, 2012 Israeli sales and service distributor [Member] | Dec. 31, 2012 Blue Reference [Member]
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 295,000 |  |  |  |  |
Accounts receivable acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,616,000 |  |  |  |  |
Inventory acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 975,000 |  |  |  |  |
Goodwill | 350,350,000 | 316,834,000 |  | 6,000,000 |  |  |  | 2,000,000 |  |  | 20,000,000 |  | 3,000,000 |  |  | 31,231,000 |  |  |  |  |
Intangible assets acquired |  |  |  | 5,000,000 |  |  |  | 1,000,000 |  |  | 3,000,000 |  | 2,000,000 |  |  | 10,844,000 |  |  |  |  |
Other assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 377,000 |  |  |  |  |
Total assets acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 45,338,000 |  |  |  |  |
Accrued expenses and other liabilities acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,013,000 |  |  |  |  |
Deferred tax liability acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,635,000 |  |  |  |  |
Cash consideration paid for acquired entity |  |  | 3,000,000 | 12,000,000 |  |  | 3,000,000 |  |  | 23,000,000 |  | 4,000,000 |  |  |  | 41,690,000 | 11,000,000 | 12,000,000 |  | 6,000,000 | 14,000,000
Debt acquired |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,000,000 |  |
Weighted-average useful life of acquired intangible assets |  |  |  |  | 7 years | 10 years |  |  | 10 years | 5 years |  |  |  | 10 years | 7 years |  |  |  |  |  |
Pro forma effect of business acquisition | The pro forma effect of the ongoing operations for Waters, LaserComp, ESS, Nonlinear Dynamics, Scarabaeus, Blue Reference, the Israeli sales and service distributor, Baehr and Anter, either individually or in the aggregate, as though these acquisitions had occurred at the beginning of the periods covered by this report wa s not significant. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of liabilities due within one year or within the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of deferred tax liability attributable to taxable temporary differences due after one year or the normal operating cycle, if longer, assumed at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 + Details
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- Definition The amount of inventory recognized as of the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6910749&loc=d3e4845-128472 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 55 -Paragraph 37 -URI http://asc.fasb.org/extlink&oid=25498275&loc=d3e2207-128464 + Details
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