XML 31 R36.htm IDEA: XBRL DOCUMENT v3.20.1
Summary of Significant Accounting Policies - Leases (Details)
12 Months Ended
Dec. 31, 2019
Leases  
Operating lease - existence of option to extend true
Finance lease - existence of option to extend true
Minimum  
Leases  
Operating lease renewal term (in years) 2 years
Finance lease renewal term (in years) 2 years
Maximum  
Leases  
Operating term of lease (in years) 5 years
Operating lease renewal term (in years) 5 years
Finance term of lease (in years) 5 years
Finance lease renewal term (in years) 5 years