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Long Term Debt - Senior Notes (Details)
$ in Millions
1 Months Ended
Jun. 30, 2016
USD ($)
Rate
Debt Instrument [Line Items]  
Senior notes $ 600.0
Senior Notes [Member]  
Debt Instrument [Line Items]  
Stated percentage | Rate 3.25%
Debt financing costs $ 5.3
Debt Instrument, Redemption, Period One [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Principal redemption percentage 100.00%
Debt Instrument, Redemption, Period Two [Member] | Senior Notes [Member]  
Debt Instrument [Line Items]  
Principal redemption percentage 100.00%