Leases (Narrative) (Details)	9 Months Ended
	Sep. 30, 2019
Lessee Lease [Line Items]
Operating lease expiration dates	expiration dates through 2029
Minimum [Member]
Lessee Lease [Line Items]
Leases termination and renewal option	1 year
Maximum [Member]
Lessee Lease [Line Items]
Leases termination and renewal option	5 years