General form of registration statement for all companies including face-amount certificate companies

Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details)

v3.19.3.a.u2
Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Thousands
Sep. 30, 2019
Dec. 31, 2018
Dec. 31, 2017
Long term debt, including current portion:      
Carrying value $ 994,000 $ 1,816,450 $ 1,718,297
Fair value   1,218,606 $ 1,645,616
Level 2      
Long term debt, including current portion:      
Carrying value 994,000 1,816,450  
Fair value [1] $ 925,660 $ 1,218,606  
[1] The fair value is based on market quotations from third party financial institutions and is classified as Level 2 in the hierarchy.