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Segments and Geographical Information (Tables)
12 Months Ended
Dec. 31, 2018
Segment Reporting [Abstract]  
Schedule of Segment Reporting Information, by Segment
These reportable operating segments are based on how our CODM views and evaluates our operations as well as allocation of resources. The following information relates to these segments (in thousands):
 
 
For the Year Ended December 31,
 
2018
 
2017
 
2016
Net revenues
 
 
 
 
 
    Clear Aligner
$
1,691,467

 
$
1,309,262

 
$
958,327

    Scanner
275,025

 
164,151

 
121,547

          Total net revenues
$
1,966,492

 
$
1,473,413


$
1,079,874

Gross profit
 
 
 
 
 
    Clear Aligner
$
1,280,495

 
$
1,019,563

 
$
747,494

    Scanner
167,372

 
97,384

 
67,800

        Total gross profit
$
1,447,867

 
$
1,116,947

 
$
815,294

Income from operations
 
 
 
 
 
    Clear Aligner
$
712,439

 
$
564,648

 
$
411,817

    Scanner
98,998

 
49,613

 
37,498

    Unallocated corporate expenses
(344,873
)
 
(260,650
)
 
(200,394
)
         Total income from operations
$
466,564

 
$
353,611

 
$
248,921

Depreciation and amortization
 
 
 
 
 
    Clear Aligner
$
29,001

 
$
21,581

 
$
13,742

    Scanner
4,965

 
4,385

 
3,871

    Unallocated corporate expenses
20,761

 
11,773

 
6,389

         Total depreciation and amortization
$
54,727

 
$
37,739

 
$
24,002

 
The following table reconciles total segment income from operations in the table above to net income before provision for income taxes and equity in losses of investee (in thousands):
 
For the Year Ended December 31,
 
2018
 
2017
 
2016
Total segment income from operations
$
811,437

 
$
614,261

 
$
449,315

Unallocated corporate expenses
(344,873
)
 
(260,650
)
 
(200,394
)
   Total income from operations
466,564

 
353,611

 
248,921

Interest income
8,576

 
6,948

 
4,213

Other income (expense), net
(8,489
)
 
4,240

 
(10,568
)
Net income before provision for income taxes and equity in losses of investee
        
$
466,651

 
$
364,799

 
$
242,566


Schedule of Revenue from External Customers and Long-Lived Assets, by Geographical Areas
Net revenues are presented below by geographic area (in thousands): 
 
For the Year Ended December 31,
 
2018
 
2017
 
2016
Net revenues (1):
 
 
 
 
 
United States (2)
$
1,023,559

 
$
836,200

 
$
692,254

The Netherlands (2)
610,039

 
456,108

 
286,911

China
155,790

 
81,661

 
46,480

Other International
177,104

 
99,444

 
54,229

Total net revenues
$
1,966,492

 
$
1,473,413

 
$
1,079,874


(1) 
Net revenues are attributed to countries based on location of where revenue is recognized.
(2) Effective July 2016, we implemented a new international corporate structure. This changed the structure of our international procurement and sales operations.

Tangible long-lived assets are presented below by geographic area (in thousands):
 
As of December 31,
 
2018
 
2017
Long-lived assets (3):
 
 
 
The Netherlands
$
206,679

 
$
143,673

United States
139,239

 
128,171

Costa Rica
80,218

 
30,738

China
36,249

 
5,480

Mexico
33,240

 
25,090

Other International
25,704

 
15,641

Total long-lived assets
$
521,329

 
$
348,793

 

(3)  Long-lived assets are attributed to countries based on entity that owns the assets.