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Cash and Cash Equivalents (Details) - USD ($)
$ in Thousands
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Cash and Cash Equivalents [Line Items]            
Cash and cash equivalents $ 237,708 $ 197,934 $ 242,696 $ 233,226 $ 251,546 $ 371,437
Cash Equivalents, at Carrying Value 22,012   916      
Cash Identified For Settling Accrued Payable To Retailer Partners 81,200   81,700      
UNITED STATES            
Cash and Cash Equivalents [Line Items]            
Cash and cash equivalents 62,600   66,500      
Foreign Financial Institutions            
Cash and Cash Equivalents [Line Items]            
Cash and cash equivalents $ 13,300   $ 11,600