Basis of Presentation Additional Information (Details) $ in Thousands	Sep. 30, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	$ 49,548
Operating Lease, Liability	53,737
Accounting Standards Update 2016-02 [Member]
Lessee, Lease, Description [Line Items]
Operating Lease, Right-of-Use Asset	38,500
Operating Lease, Liability	$ 41,800