Summary of Significant Accounting Policies - Summary Of Current And Non-Current Portions Of Commissions Receivable (Detail) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Commission receivable,Current portion	$ 9,488	$ 9,285
Commission receivable,nonCurrent portion	24,637	13,415
Contract Assets Commission Receivable	$ 34,125	$ 22,700

Amount receivable for commissions due after one year of the balance sheet date (or one operating cycle, if longer)

No definition available.

Name:	ever_CommissionReceivableNonCurrentPortion
Namespace Prefix:	ever_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant