Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease expense	$ 14,824
Finance lease expense:
Amortization of assets	978
Interest on lease liabilities	48
Short-term lease expense	336
Variable lease expense	2,663
Total lease expense	$ 18,849