Annual report pursuant to Section 13 and 15(d)

Debt - Debt Redemption (Details)

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Debt - Debt Redemption (Details) - USD ($)
$ in Thousands
3 Months Ended
Dec. 31, 2014
Jun. 30, 2015
Jun. 30, 2014
Debt Instrument [Line Items]      
Long-term debt, gross   $ 3,211,250 $ 750,000
Senior Notes | Senior Notes Due May 1, 2018      
Debt Instrument [Line Items]      
Long-term debt, gross   $ 0 $ 750,000
Pre-tax net loss on extinguishment of debt $ 131,700    
Forward Contracts | Not Designated as Hedging Instrument | Senior Notes | Treasury Lock | Senior Notes Due May 1, 2018      
Debt Instrument [Line Items]      
Derivative, gain on derivative $ 1,200