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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Other Significant Noncash Transactions (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Other Significant Noncash Transactions [Line Items] |  |  |
Unrealized (loss) gain on available-for-sale securities | $ (7,000)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss | $ (10,000)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss | $ (31,000)us-gaap_AvailableForSaleSecuritiesChangeInNetUnrealizedHoldingGainLoss
Cash paid for income taxes | 8,000,000 us-gaap_IncomeTaxesPaid | 6,600,000 us-gaap_IncomeTaxesPaid | 5,300,000 us-gaap_IncomeTaxesPaid
Common stock issued to Board of Directors and Scientific Advisory Board that was earned in a previous period [Member] |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |
Other non-cash activities | 323,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToBoardOfDirectorsAndScientificAdvisoryBoardThatWasEarnedInPreviousPeriodMember | 315,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToBoardOfDirectorsAndScientificAdvisoryBoardThatWasEarnedInPreviousPeriodMember | 328,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToBoardOfDirectorsAndScientificAdvisoryBoardThatWasEarnedInPreviousPeriodMember
Common stock issued to employees that was accrued for in a previous period, net of shares withheld for taxes [Member] |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |
Other non-cash activities | 749,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToEmployeesThatWasAccruedForInPreviousPeriodNetOfSharesWithheldForTaxesMember | 282,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToEmployeesThatWasAccruedForInPreviousPeriodNetOfSharesWithheldForTaxesMember | 252,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = oled_CommonStockIssuedToEmployeesThatWasAccruedForInPreviousPeriodNetOfSharesWithheldForTaxesMember
Other Capitalized Property Plant and Equipment [Member] |  |  |
Other Significant Noncash Transactions [Line Items] |  |  |
Other non-cash activities | $ 965,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember | $ 420,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember | $ 165,000 us-gaap_OtherSignificantNoncashTransactionValueOfConsiderationReceived1 / us-gaap_OtherSignificantNoncashTransactionsByUniqueDescriptionAxis = us-gaap_OtherCapitalizedPropertyPlantAndEquipmentMember

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- Definition This item represents the pretax change in net unrealized holding gain (loss) on available-for-sale securities that has been included in accumulated other comprehensive income, a separate component of shareholders' equity, during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27357-111563 + Details
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- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4297-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585 + Details
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- Definition The value of the noncash (or part noncash) consideration received in a transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of a transaction not resulting in cash receipts or cash payments in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 + Details
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