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Deferred Commission Expense (Tables)
 6 Months Ended
Jun. 30, 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 and six months ended June 30, 2020 and 2019:
 
 
For the Three Months Ended June 30,
 
For the Six Months Ended June 30,
(in thousands)
 
2020
 
2019
 
2020
 
2019
Balance at beginning of period
 
$
3,792

 
$
3,003

 
$
3,621

 
$
2,882

Costs capitalized
 
617

 
333

 
1,109

 
681

Amortization
 
(349
)
 
(242
)
 
(670
)
 
(469
)
Balance at end of period
 
$
4,060

 
$
3,094

 
$
4,060

 
$
3,094