Leases - Supplemental Cash Flows (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Leases [Abstract]
Operating cash flows for operating leases	$ 1,674
Operating cash flows for finance leases	103
Financing cash flows for finance leases	696,000	$ 0
ROU assets obtained in exchange for new operating lease liabilities	23,431,000
ROU assets obtained in exchange for new financing lease liabilities	$ 0