Leases - Supplemental Cash Flows and Terms (Details) $ in Thousands	6 Months Ended
	Jun. 30, 2019 USD ($)
Leases [Abstract]
Operating cash flows used for finance leases	$ 150
Operating cash flows used for operating leases	1,186
Financing cash flows used for finance leases	$ 312
Weighted average remaining lease term-finance leases (months)	105 months
Weighted average remaining lease term-operating leases (months)	346 months
Weighted average discount rate-finance leases	4.41%
Weighted average discount rate-operating leases	6.63%