Significant Accounting Policies - Leases (Details)	12 Months Ended
	Dec. 31, 2020 approach
Leases
Operating leases, existence of option to extend	true
Finance leases, existence of option to extend	true
Minimum
Leases
Number of options to renew for operating leases	1
Number of options to renew for finance leases	1
Maximum
Leases
Operating lease, term	5 years
Finance lease, term	5 years