Leases Supplemental Cash Flow Information (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Supplemental Cash Flow Information [Abstract]
Operating cash flows for operating leases	$ (4,323)
Operating cash flows for finance leases	(216)
Financing cash flows for finance leases	(301)
Lease obligations obtained in exchange for right-of-use assets
Operating leases	812
Cash used in lease activities	$ (4,028)