Leases - Schedule of Supplemental Balance Sheet, Cash Flow and Other Information (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Leases [Abstract]
Operating lease assets	$ 4,103	$ 0
Finance lease assets	5,220
Total leased assets	9,323
Operating lease liabilities	1,945	0
Finance lease liabilities	1,826
Operating lease liabilities	2,180	$ 0
Finance lease liabilities	3,627
Total lease liabilities	9,578
Accumulated amortization, finance lease assets	$ 500