Accrued Expenses and Other Noncurrent Liabilities (Tables)
 6 Months Ended
Jun. 30, 2018
Payables and Accruals [Abstract]  
Components of accrued expenses
The components of accrued expenses at June 30, 2018 and December 31, 2017 were as follows (in thousands):
 
June 30, 2018
 
December 31, 2017
Accrued compensation
$
28,730

 
$
24,206

Accrued rebates
2,068

 
2,038

Accrued employee benefits
2,573

 
2,480

Accrued professional service fees
1,437

 
698

Accrued interest
1,152

 
1,139

Deferred rent
2,519

 
2,641

Other
4,726

 
6,459

Total accrued expenses
$
43,206

 
$
39,660


Note: Amounts may not foot due to rounding.