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Derivatives (Narrative) (Details)
3 Months Ended 6 Months Ended 6 Months Ended
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2014
USD ($)
Jun. 30, 2013
USD ($)
Jun. 30, 2014
Sells euro (EUR)/Buys USD Forward
USD ($)
Jun. 30, 2014
Sells euro (EUR)/Buys USD Forward
EUR (€)
Jun. 30, 2014
Interest rate cap
USD ($)
Jun. 30, 2014
Sells pound sterling (GBP)/Buys USD Forward
USD ($)
Jun. 30, 2014
Sells pound sterling (GBP)/Buys USD Forward
GBP (£)
Jun. 30, 2014
Sells INR/Buys USD Forward
USD ($)
Jun. 30, 2014
Sells INR/Buys USD Forward
RSD
Jun. 30, 2014
Interest Rate Swap
USD ($)
Jun. 30, 2014
Interest rate swaps
USD ($)
Jun. 30, 2014
Terminated Interest Rate Swap
USD ($)
Jun. 30, 2014
Forward Contracts
USD ($)
Dec. 31, 2013
Forward Contracts
USD ($)
Jun. 30, 2014
Sells Canadian dollar (CAD)/Buys USD Forward
USD ($)
Jun. 30, 2014
Sells Canadian dollar (CAD)/Buys USD Forward
CAD
Derivative [Line Items]                                    
Foreign currency transaction gain (loss) $ 0 $ (400,000) $ 400,000 $ (400,000)                            
Reclassification of (gains)/losses on cash flow hedges into earnings upon realization 3,634,000 [1]                                  
Notional amount         64,287,000 46,950,000 500,000,000 6,501,000 3,800,000 7,576,000 456,000,000 27,708,000         37,966,000 40,500,000
Expense related to qualifying cash flow hedges expected to be reclassified to earnings over the next 12 months                         400,000 (300,000)        
Collateral already posted, aggregate fair value                             $ 6,200,000 $ 7,200,000    
[1] For the three and six months ended June 30, 2014, $3,634 is included in "Other expense" on the Company's Consolidated Statements of Operations (see Note 10). Included in "Interest expense" on the Company's Consolidated Statements of Operations are $(39) and $96 for the three and six months ended June 30, 2014, respectively, and $79 and $151 for the three and six months ended June 30, 2013, respectively.