XML 19 R57.htm IDEA: XBRL DOCUMENT v3.20.1
Fair Value Option - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Mar. 14, 2019
Feb. 22, 2019
Feb. 22, 2018
Sep. 30, 2017
Fair Value Option Qualitative Disclosures Related To Election [Line Items]              
Long term debt, fair value $ 46,485   $ 47,277        
Principal outstanding balance [1],[2] $ 634,987   $ 645,721        
5.75% Senior Subordinated Notes Due August 2023              
Fair Value Option Qualitative Disclosures Related To Election [Line Items]              
Percentage of conversion of convertible notes 5.75% 5.75%   5.75%      
Convertible Notes              
Fair Value Option Qualitative Disclosures Related To Election [Line Items]              
Percentage of conversion of convertible notes             1.50%
Convertible Notes | 5.75% Senior Subordinated Notes Due August 2023              
Fair Value Option Qualitative Disclosures Related To Election [Line Items]              
Percentage of conversion of convertible notes 5.75% 5.75% 5.75%   5.75% 5.75%  
Long term debt, fair value $ 46,500   $ 47,300        
Principal outstanding balance 94,400   $ 94,400        
Change in fair value of convertible notes $ 800 $ 20,000          
[1] Carrying amounts include aggregate unamortized debt discount and debt issuance costs.
[2] Includes the 5.75% Convertible Notes accounted for under the fair value option. See to Note 6.