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Consolidated Statements Of Comprehensive Income (Loss) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Statement of Comprehensive Income [Abstract]      
Net income $ 18,795us-gaap_NetIncomeLoss $ 47,954us-gaap_NetIncomeLoss $ 16,883us-gaap_NetIncomeLoss
Other Comprehensive Income (Loss), Net of Tax [Abstract]      
Unrealized loss on marketable securities, net of income tax benefit of $(11), $0 and $0 (18)us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax 0us-gaap_OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
Foreign currency translation, net of income tax provision (benefit) of $15, $20 and $(9) (534)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent (381)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent (83)us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent
Comprehensive income $ 18,243us-gaap_ComprehensiveIncomeNetOfTax $ 47,573us-gaap_ComprehensiveIncomeNetOfTax $ 16,800us-gaap_ComprehensiveIncomeNetOfTax