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

Income Taxes - Narrative (Details)

v3.19.3.a.u2
Income Taxes - Narrative (Details) - USD ($)
1 Months Ended 2 Months Ended 3 Months Ended 8 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Aug. 31, 2019
Dec. 31, 2018
Sep. 30, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Aug. 31, 2019
Sep. 30, 2018
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Tax Credit Carryforward [Line Items]                              
Deferred tax assets, increase in valuation allowance                         $ 42,731,000    
Increase (decrease) in valuation allowance affecting income tax expense                         52,916,000 $ 39,499,000 $ 26,892,000
Net operating loss $ 3,129,000 $ (9,111,000) $ 316,590,000 $ (12,280,000) $ 201,845,000 $ (12,012,000) $ (14,647,000) $ (12,896,000) $ 11,848,000 $ (16,609,000) $ (47,565,000) $ 177,553,000 494,143,000 (32,304,000) $ (67,649,000)
Operating loss carryforwards, limitation as per IRC     129,521,000                   129,521,000    
Alternative minimum tax credit carryforwards     426,000                   426,000    
Accrued interest and penalties related to uncertain tax positions     143,000                   143,000    
Expected increase in uncertain tax position in next twelve months     0                   0    
Expected decrease in uncertain tax position in next twelve months     0                   0    
Federal                              
Tax Credit Carryforward [Line Items]                              
Operating loss carryforwards     698,952,000                   698,952,000    
Net operating loss                           $ 676,746,000  
State                              
Tax Credit Carryforward [Line Items]                              
Operating loss carryforwards     222,874,000                   222,874,000    
Tax credit carryforward     $ 783,000                   783,000    
Impact of adoption of Topic 606                              
Tax Credit Carryforward [Line Items]                              
Increase (decrease) in valuation allowance affecting income tax expense                         $ (5,945,000)