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Derivative Financial Instruments ( Statement Of Operations Information) (Details) (Not Designated as Hedging Instruments [Member], USD $)
In Thousands, unless otherwise specified
 3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Derivative [Line Items]        
Derivative financial instruments, net gain (loss) recognized $ 1,845 $ 121 $ 1,655 $ 219
Foreign currency forward contracts [Member]
        
Derivative [Line Items]        
Derivative financial instruments, net gain (loss) recognized (362) (35) (362) (35)
TBAs [Member]
        
Derivative [Line Items]        
Derivative financial instruments, net gain (loss) recognized $ 2,207 $ 156 $ 2,017 $ 254