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Long-Term Debt and Capital Lease Obligations - Cash Convertible Senior Notes (Details) - 2.125% cash convertible senior notes due 2019 [Member] - USD ($)
1 Months Ended
Jul. 02, 2014
Jun. 30, 2014
Sep. 30, 2015
Jun. 27, 2014
Debt Instrument [Line Items]        
Convertible senior notes issued and settled $ 30,000,000 $ 200,000,000    
Stated interest rate   2.125% 2.125%  
Option to purchase additional principal   $ 30,000,000   $ 30,000,000
Deferred financing costs   8,800,000    
Previously Reported [Member]        
Debt Instrument [Line Items]        
Deferred financing costs   $ 9,900,000