Annual report pursuant to Section 13 and 15(d)

Basis of Presentation - Narrative (Details)

v3.19.1
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    
Impact of adoption of ASU 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact (reduction) gain of adopting ASU     $ 605  
Accumulated Deficit | Impact of adoption of ASU 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact (reduction) gain of adopting ASU     (605)  
Accumulated Deficit | Impact of adoption of ASU 2017-12 | New Accounting Pronouncement, Early Adoption, Effect        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact (reduction) gain of adopting ASU     (605)  
Accumulated Other Comprehensive Income (Loss) | Impact of adoption of ASU 2017-12        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact (reduction) gain of adopting ASU     605  
Accumulated Other Comprehensive Income (Loss) | Impact of adoption of ASU 2017-12 | Adjustments for New Accounting Principle, Early Adoption        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Impact (reduction) gain of adopting ASU     $ 605  
Merger Sub | Ascent Capital        
Acquired Indefinite-lived Intangible Assets [Line Items]        
Percentage of voting interests acquired       100.00%