Leases - Lease Expense and Cash Outflows from Operating and Finance Leases (Details) (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Leases [Abstract]
Operating lease cost	$ 37,817
Short-term lease cost	1,379
Variable lease cost	3,149
Amortization	224
Interest on lease liabilities	15
Total lease cost	42,584
Cash paid for amounts included in measurement of lease liabilities:
Operating cash flows from operating leases	37,684
Operating cash flows from finance leases	15
Financing cash flows from finance leases	217
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	41,776
Finance leases	$ 159