Description of Business and Summary of Significant Accounting Policies Description of Business and Summary of Significant Accounting Policies - Receivables and Deferred Revenue (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Contract Balances [Roll Forward]
Opening balance, Receivable	$ 46,023
Closing balance, Receivable	87,620
Opening balance, Contract Acquisition Costs noncurrent	13,400
Closing balance, Contract Acquisition Costs noncurrent	32,000
Opening balance, Deferred Revenue (current)	55,015
Increase (decrease) in current deferred revenue (current)	33,736
Closing balance, Deferred Revenue (current)	88,751
Ending balance, Deferred revenue (long-term)	222
Increase (decrease) in long-term deferred revenue, net	216
Closing balance, Deferred revenue (long-term)	438
Accounts Receivable
Contract Balances [Roll Forward]
Opening balance, Receivable	34,211
Increase (decrease) in accounts receivable, net	36,107
Closing balance, Receivable	70,318
Unbilled Receivable
Contract Balances [Roll Forward]
Opening balance, Receivable	11,812
Increase (decrease) in unbilled receivable, net	5,490
Closing balance, Receivable	17,302
Opening balance, Contract Acquisition Costs noncurrent	13,361
Increase (decrease) in contract acquisition costs noncurrent	18,604
Closing balance, Contract Acquisition Costs noncurrent	$ 31,965