Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Narrative) (Details)

v3.8.0.1
Long-Term Debt (Narrative) (Details)
 3 Months Ended 9 Months Ended
Jan. 27, 2015
USD ($)
Sep. 30, 2017
USD ($)
Rate
Sep. 30, 2016
USD ($)
Sep. 30, 2017
USD ($)
Rate
Sep. 30, 2016
USD ($)
Dec. 31, 2016
USD ($)
Debt Instrument [Line Items]            
Change in fair value of derivative instrument, net of tax   $ 13,000 $ 857,000 $ (47,000) $ (630,000)  
Credit Agreement 1.25B [Member]            
Debt Instrument [Line Items]            
Secured credit $ 1,250,000,000.00          
Long-term Debt, Gross   $ 476,250,000 631,250,000 $ 476,250,000 631,250,000 $ 515,000,000
Debt Instrument, Term 5 years          
Maximum borrowing capacity $ 1,750,000,000.00          
Maximum leverage ratio, required 3.50          
Minimum interest coverage ratio, required 3.00          
Actual leverage ratio       1.8    
Actual interest coverage ratio       17.9    
Debt Instrument, Interest Rate, Effective Percentage | Rate   2.74%   2.74%    
Credit Agreement 1.25B [Member] | Long-term Debt [Member]            
Debt Instrument [Line Items]            
Secured credit $ 500,000,000 $ 456,250,000 481,250,000 $ 456,250,000 481,250,000 475,000,000
Credit Agreement 1.25B [Member] | Revolving credit facility [Member]            
Debt Instrument [Line Items]            
Secured credit   20,000,000 $ 150,000,000 20,000,000 $ 150,000,000 $ 40,000,000
Revolving credit facility $ 750,000,000          
Letters of Credit Outstanding, Amount   14,500,000   14,500,000    
Line of Credit Facility, Remaining Borrowing Capacity   $ 429,800,000   $ 429,800,000    
Credit Agreement 1.25B [Member] | Minimum [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Commitment Fee Percentage 0.20%          
Credit Agreement 1.25B [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Line of Credit Facility, Commitment Fee Percentage 0.40%          
HSNi Subsidiaries [Member] | Credit Agreement 1.25B [Member]            
Debt Instrument [Line Items]            
Secured rate 100.00%          
First Tier Subsidiaries [Member] | Credit Agreement 1.25B [Member]            
Debt Instrument [Line Items]            
Secured rate 65.00%          
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement 1.25B [Member] | Minimum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 1.25%          
London Interbank Offered Rate (LIBOR) [Member] | Credit Agreement 1.25B [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 2.25%          
Base Rate [Member] | Credit Agreement 1.25B [Member] | Minimum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 0.25%          
Base Rate [Member] | Credit Agreement 1.25B [Member] | Maximum [Member]            
Debt Instrument [Line Items]            
Debt Instrument, Interest Rate, Stated Percentage 1.25%