XML 29 R31.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Long-Term Investments - Additional Information (Detail) (USD $) | 9 Months Ended |  |  |
--- | --- | --- | --- | ---
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Dec. 31, 2011
Auction rate securities, par value | $ 7,241,000 | $ 7,845,000 |  |
Minimum Period for which failed Auction Securities been in unrealized loss position | 12 months |  |  |
Fair value of Failed Auction Securities | 6,231,000 | 6,736,000 |  |
Gross Unrealized Losses | 1,018,000 | 1,121,000 |  |
Aggregate credit loss | 395,000 | 317,000 | 292,000 | 308,000
Failed Auction Securities [Member] |  |  |  |
Auction rate securities, par value | 6,000,000 | 6,100,000 |  |
Interest rates auction time | 28 days |  |  |
Period for which Failed Auction Securities been in unrealized loss position | Exceeds 12 months |  |  |
Fair value of Failed Auction Securities | 4,982,000 | 4,979,000 |  |
Increase in fair value | 103,000 |  |  |
Gross Unrealized Losses | 1,018,000 | 1,121,000 |  |
Aggregate credit loss | 395,000 |  |  |
Aggregate temporary impairment loss | 623,000 |  |  |
Increased aggregate credit (losses) gains on Failed Auction Securities | $ 78,000 |  |  |

X
- Definition Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562 + Details
Name: | us-gaap_AvailableForSaleSecurities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any. + 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 210.5-02.2) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27340-111563 + Details
Name: | us-gaap_OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Aggregate temporary impairment loss. + References No definition available. + Details
Name: | vicr_AggregateTemporaryImpairmentLoss
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Auction failed securities unrealized loss position minimum period. + References No definition available. + Details
Name: | vicr_AuctionFailedSecuritiesUnrealizedLossPositionMinimumPeriod
Namespace Prefix: | vicr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of accumulated pre-tax unrealized loss before deducting pre-tax unrealized gain on investments in available-for-sale securities impacting investments. + References No definition available. + Details
Name: | vicr_AvailableForSaleSecuritiesGrossUnrealizedLossAccumulatedInInvestments
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Increase in fair value of available for sale securities. + References No definition available. + Details
Name: | vicr_IncreaseInFairOfAvailableForSaleSecurities
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Interest rates auction time. + References No definition available. + Details
Name: | vicr_InterestRatesAuctionPeriod
Namespace Prefix: | vicr_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period for which failed auction securities been in an unrealized loss position. + References No definition available. + Details
Name: | vicr_PeriodForWhichFailedAuctionSecuritiesBeenInUnrealizedLossPosition
Namespace Prefix: | vicr_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Subsequent loss recovery. + References No definition available. + Details
Name: | vicr_SubsequentLossRecovery
Namespace Prefix: | vicr_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration