Leases - Supplemental Cash Flow Information (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2019 USD ($)
Leases [Abstract]
Operating cash flows from operating leases	$ 1,673
Operating cash flows from finance leases	1
Financing cash flows from finance leases	67
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	1,131
Right-of-Use Asset Obtained in Exchange for Finance Lease Liability	$ 0