Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt (Narrative) (Details)

v2.4.0.8
Long-Term Debt (Narrative) (Details) (USD $)
0 Months Ended 9 Months Ended
Apr. 24, 2012
Sep. 30, 2014
Term loan [Member]
   
Debt Instrument [Line Items]    
Revolving credit facility $ 250,000,000  
Debt Instrument, Interest Rate, Effective Percentage   1.6567%
Revolving credit facility [Member]
   
Debt Instrument [Line Items]    
Revolving credit facility 350,000,000  
Letters of Credit Outstanding, Amount   13,100,000
Line of Credit Facility, Remaining Borrowing Capacity   336,900,000
Line of Credit Facility, Amount Outstanding   0
Syndicated Credit Agreement [Member]
   
Debt Instrument [Line Items]    
Revolving credit facility 600,000,000  
Term of debt 5 years  
Maximum borrowing capacity 850,000,000  
Deferred Finance Costs, Noncurrent, Net $ 5,500,000  
Maximum leverage ratio, required   3.00
Minimum interest coverage ratio, required   3.00
Actual leverage ratio   0.70
Actual interest coverage ratio   55.58
Minimum [Member] | Revolving credit facility [Member]
   
Debt Instrument [Line Items]    
Line of Credit Facility, Commitment Fee Percentage   0.25%
Minimum [Member] | Syndicated Credit Agreement [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.50%  
Debt Instrument, Interest Rate, Effective Percentage 0.50%  
Maximum [Member] | Revolving credit facility [Member]
   
Debt Instrument [Line Items]    
Line of Credit Facility, Commitment Fee Percentage   0.40%
Maximum [Member] | Syndicated Credit Agreement [Member]
   
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.25%  
Debt Instrument, Interest Rate, Effective Percentage 1.25%  
Voting Equity Securities Of H S Ni U S Subsidiaries [Member]
   
Debt Instrument [Line Items]    
Secured rate 100.00%  
Voting Equity Securities Of First Tier Subsidiaries [Member]
   
Debt Instrument [Line Items]    
Secured rate 65.00%