XML 63 R35.htm IDEA: XBRL DOCUMENT v3.19.3
Basis of Presentation (Narrative) (Details)
 9 Months Ended
Mar. 20, 2019
shares
Oct. 01, 2018
Sep. 30, 2019
item
state
Basis of Presentation [Abstract]      
Number of systems or appliances covered under service plans | item     21
Number of States in which Entity Operates | state     50
Common stock, percentage held by stockholders   80.20%  
Number Of Common Stock Received, From Spin-Off Transaction, Conversion   1  
Number Of Common Stock From Previous Parent Company Held, Spin Off Transaction, Conversion   2  
Number of shares transferred to financial institution, pursuant to exchange agreement | shares 16,734,092