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Deferred Commission Expense (Tables)
 3 Months Ended
Mar. 31, 2020
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Deferred Commission Expense
The table below provides a rollforward of deferred commission expense for each of the three months ended March 31, 2020 and 2019:
 
 
For the Three Months Ended March 31,
(in thousands)
 
2020
 
2019
Balance at beginning of period
 
$
3,621

 
$
2,882

Costs capitalized
 
492

 
348

Amortization
 
(321
)
 
(227
)
Balance at end of period
 
$
3,792

 
$
3,003