Leases - Components of Lease Expense (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease costs	$ 38,449
Financing lease costs:
Amortization of right-of-use assets	845
Interest on lease liabilities	83
Total financing lease costs	928
Variable lease costs	4,361
Total lease costs	$ 43,738