Leases Narrative (Details) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease, option to extend, term	P5Y
2019		$ 18,000
2020		17,300
2021		15,700
2022		13,700
2023		11,400
Thereafter		$ 43,300
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, remaining lease term	20 years