• Filing Date: 2017-02-22
  • Form Type: 10-K
  • Description: Annual report
v3.6.0.2
Long-Term Debt (3.875% Convertible Senior Notes) - Additional Information (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 12 Months Ended
Jan. 31, 2015
$ / shares
Mar. 31, 2016
USD ($)
Dec. 31, 2016
USD ($)
d
$ / shares
Dec. 31, 2015
USD ($)
$ / shares
Debt Instrument [Line Items]        
Debt instrument, face amount     $ 147,985 $ 143,250
Debt instrument, effective interest rate     8.30%  
Debt discount, remaining amortization period     2 years 2 months 12 days  
Repurchase of convertible senior notes     $ 11,347  
Unamortized debt discount and issuance costs     (9,122) (13,821)
Convertible Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt instrument, face amount     $ 89,990 $ 103,000
Debt instrument, stated interest rate     3.875%  
Debt instrument, maturity date     Mar. 15, 2019  
Aggregate amount of debt repurchased   $ 13,010    
Repurchase of convertible senior notes   11,347    
Commission related to repurchases of convertible senior notes   81    
Gain on extinguishment of debt   153    
Unamortized debt discount and issuance costs   $ 1,591    
Convertible debt, conversion price | $ / shares     $ 62.12 $ 62.47
Convertible debt, conversion ratio     16.0969 16.0090
Convertible debt, conversion debt description     The note holders may convert all or a portion of their Convertible Notes during specified periods as follows: (1) during any calendar quarter commencing after the calendar quarter ending on March 31, 2014, if the last reported sale price of the Company’s common stock for at least 20 trading days during the period of 30 consecutive trading days ending on the last trading day of the immediately preceding calendar quarter is greater than 130% of the conversion price on each applicable trading day; (2) during the five business-day period after any ten consecutive trading-day period in which the trading price per $1 principal amount of the Convertible Notes is less than 98% of the product of the last reported sale price and the conversion rate on each such trading day; (3) if specified corporate events, including a change in control, occur; or (4) at any time on or after January 1, 2019.  
Convertible debt, threshold trading days | d     20  
Convertible debt, threshold consecutive trading days     30 days  
Convertible debt, threshold percentage of stock trigger price     130.00%  
Convertible Senior Notes [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Cash dividends on common stock | $ / shares       $ 0.275
Convertible Senior Notes [Member] | Convertible Debt Instrument Conversion Period Two [Member]        
Debt Instrument [Line Items]        
Convertible debt, threshold trading days     5 days  
Convertible debt, threshold consecutive trading days     10 days  
Convertible debt, threshold percentage of stock trigger price     98.00%  
Convertible Senior Notes [Member] | Convertible Debt Instrument Conversion Period Two [Member] | Minimum [Member]        
Debt Instrument [Line Items]        
Cash dividends on common stock | $ / shares $ 0.275