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

Basis of Presentation - Narrative (Details)

v3.19.3.a.u2
Basis of Presentation - Narrative (Details)
$ in Thousands
3 Months Ended
Jun. 30, 2018
segment
Mar. 31, 2018
segment
Jan. 01, 2018
USD ($)
Dec. 17, 2010
Acquired Indefinite-lived Intangible Assets [Line Items]        
Number of reportable segments | segment 1 2    
Accounting Standards Update 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact of adoption     $ 605  
Accumulated Deficit | Accounting Standards Update 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact of adoption     (605)  
Accumulated Deficit | Accounting Standards Update 2017-12 | New Accounting Pronouncement, Early Adoption, Effect        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact of adoption     (605)  
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact of adoption     605  
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2017-12 | Adjustments for New Accounting Principle, Early Adoption        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact of adoption     $ 605  
Merger Sub | Ascent Capital        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Percentage of voting interests acquired       100.00%