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Summary of Significant Accounting Policies - Revenue - Contract Fulfillment Costs (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Intake Costs asset
Capitalized Contract Cost [Line Items]
GROSS CARRYING AMOUNT	$ 71,336	$ 63,721
ACCUMULATED AMORTIZATION	(42,678)	(33,352)
NET CARRYING AMOUNT	28,658	30,369
Commissions asset
Capitalized Contract Cost [Line Items]
GROSS CARRYING AMOUNT	114,791	91,069
ACCUMULATED AMORTIZATION	(50,553)	(38,787)
NET CARRYING AMOUNT	$ 64,238	$ 52,282

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Amount, before allowance for credit loss, of right to consideration in exchange for good or service transferred to customer, when right is conditioned on something other than passage of time.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
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