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Derivative Financial Instruments (Details)
 12 Months Ended 12 Months Ended
Dec. 31, 2012
Foreign exchange contracts [Member]
Dec. 31, 2013
Foreign exchange contracts [Member]
USD ($)
Dec. 31, 2013
Foreign exchange contracts [Member]
GBP (£)
Dec. 31, 2013
Not Designated as Hedging Instrument [Member]
Interest rate swaps [Member]
Interest expense [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Interest rate swaps [Member]
Interest expense [Member]
USD ($)
Dec. 31, 2013
Not Designated as Hedging Instrument [Member]
Foreign exchange contracts [Member]
Gain (loss) on foreign currency [Member]
USD ($)
Dec. 31, 2012
Not Designated as Hedging Instrument [Member]
Foreign exchange contracts [Member]
Gain (loss) on foreign currency [Member]
USD ($)
Derivative Instruments, Gain (Loss) [Line Items]              
Amount of gain (loss) recognized in income on derivative          $ 68,000 $ 11,000 $ 153,000
Notional amount   $ 8,300,000 £ 2,100,000        
Maximum maturity period 1 year