Operating Leases and Service Commitment - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Leased Assets [Line Items]
Lease, discount rate	5.25%
Rent expense	$ 10,960	$ 10,250
Accrued expenses and other long-term liabilities | Operating Lease Expense
Operating Leased Assets [Line Items]
Deferred rent credit	2,115	$ 2,209
General and administrative expense
Operating Leased Assets [Line Items]
Operating lease, cost	$ 10,560