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Income Taxes - Earnings Before Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Earnings before income taxes      
Earnings before income taxes $ 39,348us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ 18,063us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments $ 14,444us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
Domestic Tax Authority [Member]      
Earnings before income taxes      
Earnings before income taxes 19,205us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		 (5,396)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember		 (6,184)us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_DomesticCountryMember
Foreign Tax Authority [Member]      
Earnings before income taxes      
Earnings before income taxes $ 20,143us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		 $ 23,459us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember		 $ 20,628us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments
/ us-gaap_IncomeTaxAuthorityAxis
= us-gaap_ForeignCountryMember