Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Fair Value Measurements - Schedule of Instruments Not Carried at Fair Value (Details) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Long term debt, including current portion:    
Carrying value $ 1,838,900 $ 1,816,450
Level 2    
Long term debt, including current portion:    
Carrying value 1,838,900 1,816,450
Fair value [1] $ 1,196,619 $ 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.