Leases Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Operating lease expense	$ 30,991
Amortization of ROU assets	382
Interest on lease liabilities	76
Short-term lease expense	26,843
Total lease expense	$ 58,292