Leases - Components of Lease Expense (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Leases [Abstract]
Operating lease cost	$ 2,466	$ 1,570
Finance lease cost
Amortization of right-of-use assets	89	80
Interest on lease liabilities	12	15
Total finance lease cost	101	95
Short-term lease cost	1,029	1,991
Total lease expense	$ 3,596	$ 3,656