Annual report pursuant to Section 13 and 15(d)

Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies (Schedule Of Accounts Receivable, Net) (Details)

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Summary Of Significant Accounting Policies Summary Of Significant Accounting Policies (Schedule Of Accounts Receivable, Net) (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net $ 335,005 $ 306,575
Other Receivable [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net 26,124 27,130
Flexpay and other customer-related [Member] | Trade Accounts Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net 281,780 260,197
Credit card companies [Member] | Trade Accounts Receivables [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Accounts receivable, net $ 27,101 $ 19,248