Current Expected Credit Losses (CECL) - Summary of Allowance for Expected Credit Losses by Portfolio Segment (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2020 USD ($)
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance, January 1, 2020	$ 1,944
Current-period provision for expected credit losses	765
Ending balance, March 31, 2020	2,709
Accrued Commissions Receivable [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance, January 1, 2020	811
Current-period provision for expected credit losses	179
Ending balance, March 31, 2020	990
Employee-Related Receivables [Member]
Financing Receivable Allowance For Credit Losses [Line Items]
Beginning balance, January 1, 2020	1,133
Current-period provision for expected credit losses	586
Ending balance, March 31, 2020	$ 1,719