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Consolidated Statements Of Comprehensive Income (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Net income $ 44,467us-gaap_NetIncomeLoss $ 27,376us-gaap_NetIncomeLoss $ 47,218us-gaap_NetIncomeLoss
OTHER COMPREHENSIVE INCOME (LOSS), NET OF TAX EFFECT OF NIL      
Change in net foreign currency translation adjustments (1,202)us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 633us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax 1,947us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
Change in deferred pension gain (loss) (388)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax (203)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax (337)us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
OTHER COMPREHENSIVE INCOME (LOSS) (1,590)us-gaap_OtherComprehensiveIncomeLossNetOfTax 430us-gaap_OtherComprehensiveIncomeLossNetOfTax 1,610us-gaap_OtherComprehensiveIncomeLossNetOfTax
TOTAL COMPREHENSIVE INCOME $ 42,877us-gaap_ComprehensiveIncomeNetOfTax $ 27,806us-gaap_ComprehensiveIncomeNetOfTax $ 48,828us-gaap_ComprehensiveIncomeNetOfTax