Quarterly report pursuant to Section 13 or 15(d)

Financing Arrangements (Notes Payable) (Details)

v3.5.0.2
Financing Arrangements (Notes Payable) (Details) - USD ($)
$ in Thousands
Jun. 30, 2016
Dec. 31, 2015
Notes Payable, Current and Noncurrent [Abstract]    
Net carrying amount $ 0 $ 0
2019 convertible senior notes    
Notes Payable, Current and Noncurrent [Abstract]    
Principal amount outstanding 245,000 245,000
Unamortized discount (34,673) (39,628)
Net carrying amount 210,327 205,372
Less: Unamortized deferred financing costs 2,964 3,387
Total notes payable $ 207,363 $ 201,985