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Derivative Instruments and Hedging Activities (Tables)
 3 Months Ended
Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]  
Terms Of Interest Rate Swap Agreements
The following table summarizes the notional amounts and fair values of our designated cash flow hedges as of March 31, 2015 and December 31, 2014 (in thousands):
 
 
Notional Amount
 
Fair Value at March 31, 2015 (USD)
 
Fair Value at December 31, 2014 (USD)
 
 
March 31, 2015
 
December 31, 2014
 
Other Accrued Expenses
 
Other Noncurrent Liabilities
 
Other Accrued Expenses
 
Other Noncurrent Liabilities
Interest rate swap agreements
 
 
 
 
 
 
 
 
USD denominated
 
$
420,000

 
$
420,000

 
$
1,903

 
$
1,857

 
$
2,691

 
$
1,615

GBP denominated
 
£
50,000

 
£
50,000

 
—

 
852

 
—

 
893

CAD denominated
 
C$
25,000

 
C$
25,000

 
111

 
—

 
—

 
19

Total cash flow hedges
 
$
2,014

 
$
2,709

 
$
2,691

 
$
2,527