Lease Accounting Lease Accounting - Lessee Narrative (Details)	6 Months Ended
	Jun. 30, 2019
Minimum
Lessee, Lease, Description [Line Items]
Remaining lease term	1 year
Extended lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Remaining lease term	34 years
Extended lease term	10 years