XML 12 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Convertible Senior Notes (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 0 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 17, 2014
Convertible Debt [Member]
2019 Notes [Member]
Mar. 31, 2014
Convertible Debt [Member]
2019 Notes [Member]
Debt Instrument [Line Items]        
Principal amount     $ 143,750  
Proceeds from issuance of convertible senior notes 143,750 0 134,405  
Coupon rate     5.50%  
Effective rate     6.25% 6.25%
Conversion Rate     55.3649  
Remaining period of amortization     4 years 9 months 4 days  
Share Price       $ 16.63
Conversion price       $ 18.06
Equity component of the notes 4,617     4,617
Interest Expense, Debt       307
Interest Expense, Debt, Non-cash       $ 61