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Balance Sheet Components (Tables)
 12 Months Ended
Dec. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Condensed Balance Sheet
Balance sheet details as of December 31, 2017 and December 31, 2016 are presented in the tables below:
 
December 31,
 
2017
 
2016
 
(In thousands)
Inventories:
 
 
 
Raw materials
$
22,750

 
$
14,322

Work in process
9,818

 
7,800

Finished goods
63,569

 
47,175

Total inventories
$
96,137

 
$
69,297

 
 
 
 
Prepaid expenses
 
 
 
   Prepaid commissions
$
15,671

 
$
13,176

   Other prepaid expenses
20,389

 
15,470

Total prepaid expense
$
36,060

 
$
28,646

 
 
 
 
Property and equipment:
 
 
 
Equipment
$
69,550

 
$
64,384

Furniture and fixtures
6,534

 
6,517

Leasehold improvements
10,976

 
9,778

Software
37,168

 
35,607

Construction in progress
9,813

 
7,211

Property and equipment, gross
134,041

 
123,497

Accumulated depreciation and amortization
(91,446
)
 
(81,486
)
Total property and equipment, net
$
42,595

 
$
42,011

 
 
 
 
Other long term assets:
 
 
 
Capitalized software, net
$
38,599

 
$
33,233

Other assets
1,242

 
1,818

Total other long term assets, net
$
39,841

 
$
35,051

 
 
 
 
Accrued liabilities:
 
 
 
Advance payments from customers
$
7,779

 
$
7,030

Rebates and lease buyouts
5,428

 
4,025

Group purchasing organization fees
3,449

 
3,737

Taxes payable
9,183

 
4,003

Other accrued liabilities
9,854

 
12,400

Total accrued liabilities
$
35,693

 
$
31,195

 
 
 
 
Schedule of Accumulated Other Comprehensive Income
The following table summarizes the changes in accumulated balances of other comprehensive income (loss) for the years ended December 31, 2017 and December 31, 2016:
 
Foreign currency translation adjustments
 
Unrealized gain (loss) on interest rate swap hedges
 
Total
 
(In thousands)
Balance as of December 31, 2015
$
(2,730
)
 
$
—

 
$
(2,730
)
     Other comprehensive income (loss) before reclassifications
(8,034
)
 
1,385

 
(6,649
)
     Amounts reclassified from other comprehensive income (loss)
—

 
(140
)
 
(140
)
     Net current-period other comprehensive income (loss), net of tax
(8,034
)
 
1,245

 
(6,789
)
Balance as of December 31, 2016
(10,764
)
 
1,245

 
(9,519
)
     Other comprehensive income (loss) before reclassifications
3,810

 
409

 
4,219

     Amounts reclassified from other comprehensive income (loss), net of tax
—

 
(813
)
 
(813
)
     Net current-period other comprehensive income (loss), net of tax
3,810

 
(404
)
 
3,406

Balance as of December 31, 2017
$
(6,954
)
 
$
841

 
$
(6,113
)