Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements and Derivatives - Effects of interest rate swaps which were not designated as hedging instruments (Detail 11)

v2.4.1.9
Fair Value Measurements and Derivatives - Effects of interest rate swaps which were not designated as hedging instruments (Detail 11) (Not Designated as Hedging Instrument, Interest rates swaps, USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Not Designated as Hedging Instrument | Interest rates swaps
      
Derivative Instruments Gain Loss [Line Items]      
Gain (loss) recognized in other income (expense) $ (3)us-gaap_DerivativeGainOnDerivative
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_InterestRateSwapMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_NondesignatedMember