• Filing Date: 2018-08-20
  • Form Type: 10-Q
  • Description: Quarterly report
v3.10.0.1
Fair Value Measurements - Changes in Life Expectancy Used to Estimate Fair Value (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2018
Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Value $ 569,373 $ 567,492
Change in Value 0  
+6 Life Expectancy Months Adjustment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Value 479,154  
Change in Value (90,219)  
-6 Life Expectancy Months Adjustment    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Value 665,721  
Change in Value $ 96,348