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Summary of Significant Accounting Policies (Tables)
9 Months Ended
Sep. 28, 2019
Accounting Policies [Abstract]  
Fair Value Measurements, Recurring and Nonrecurring
The following tables represent the Company’s financial assets (in thousands), measured at fair value on a recurring basis as of September 28, 2019:
 
 
 
 
 
 
 
 
 
Reported as
 
Adjusted Basis
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
(Losses)
 
Estimated
Fair Value
 
Cash and Cash Equivalents
 
Short-Term
Investments
Cash
$
513,360

 
$

 
$

 
$
513,360

 
$
513,360

 
$

Level 1:
 
 
 
 
 
 
 
 
 
 
 
Certificates of deposit
120,000

 

 

 
120,000

 

 
120,000

               Subtotal
120,000

 

 

 
120,000

 

 
120,000

Level 2:
 
 
 
 
 
 
 
 
 
 
 
          None

 

 

 

 

 

Level 3:
 
 
 
 
 
 
 
 
 
 
 
          None

 

 

 

 

 

Total assets measured at fair value
$
633,360

 
$

 
$

 
$
633,360

 
$
513,360

 
$
120,000


Property, Plant and Equipment
Property and equipment are stated at cost. Depreciation is calculated using the straight-line method over estimated useful lives as follows:
 
Useful Lives
Aircraft and components
10 to 20 years
Buildings
39 years
Building improvements
7 to 15 years
Computer equipment
2 to 6 years
Demonstration units
3 years
Furniture and office equipment
2 to 6 years
Leasehold improvements
Lesser of useful life or term of lease
Machinery and equipment
5 to 10 years
Tooling
3 years
Vehicles
5 years

Property and equipment, net, consists of the following (in thousands):
 
September 28,
2019
 
December 29,
2018
Building and building improvements
$
91,704

 
$
88,449

Machinery and equipment
58,582

 
54,525

Land
40,216

 
23,762

Aircraft and vehicles
28,818

 
25,555

Computer equipment
19,214

 
16,582

Leasehold improvements
17,574

 
16,428

Tooling
15,070

 
14,212

Furniture and office equipment
10,708

 
10,459

Demonstration units
792

 
470

Construction-in-progress (CIP)
37,309

 
13,320

     Total property and equipment
319,987

 
263,762

Accumulated depreciation
(110,529
)
 
(97,790
)
     Property and equipment, net
$
209,458

 
$
165,972


Changes in Product Warranty Accrual
Changes in the product warranty accrual were as follows (in thousands):
 
Nine Months Ended
 
September 28,
2019
 
September 29,
2018
Warranty accrual, beginning of period
$
1,910

 
$
1,149

Accrual for warranties issued
1,920

 
943

Changes to pre-existing warranties (including changes in estimates)(1)
1,404

 
779

Settlements made
(1,276
)
 
(974
)
Warranty accrual, end of period
$
3,958

 
$
1,897


______________
(1)
In connection with its adoption of ASC 842 on December 30, 2018, the Company recorded an adjustment to pre-existing warranties of $2.5 million related to equipment previously capitalized under its deferred equipment agreements where the embedded leases were treated as operating leases under prior guidance. See “Recently Adopted Accounting Pronouncements” to these condensed consolidated financial statements for additional information related to the Company’s adoption of ASC 842.
Changes in Accumulated Other Comprehensive Loss
The change in accumulated other comprehensive loss was as follows (in thousands):
 
Nine Months Ended 
 September 28, 2019
Accumulated other comprehensive loss, beginning of period
$
(6,199
)
Unrealized gains from foreign currency translation adjustments
(1,595
)
Accumulated other comprehensive loss, end of period
$
(7,794
)

Reconciliation of Basic and Diluted Net Income Per Share
A reconciliation of basic and diluted net income per share is as follows (in thousands, except per share amounts):
 
Three Months Ended
 
Nine Months Ended
 
September 28,
2019
 
September 29,
2018
 
September 28,
2019
 
September 29,
2018
Net income
$
49,085

 
$
57,126

 
$
143,295

 
$
146,609

Basic net income per share:
 
 
 
 
 
 
 
Weighted-average shares outstanding - basic
53,535

 
52,432

 
53,367

 
52,046

Net income per basic share
$
0.92

 
$
1.09

 
$
2.69

 
$
2.82

Diluted net income per share:
 
 
 
 
 
 
 
Weighted-average shares outstanding - basic
53,535

 
52,432

 
53,367

 
52,046

Diluted share equivalent: stock options, RSUs and PSUs
3,727

 
3,805

 
3,688

 
3,829

Weighted-average shares outstanding - diluted
57,262

 
56,237

 
57,055

 
55,875

Net income per diluted share
$
0.86

 
$
1.02

 
$
2.51

 
$
2.62


Supplemental Cash Flow Information
Supplemental cash flow information includes the following (in thousands):
 
Nine Months Ended
 
September 28,
2019
 
September 29,
2018
Cash paid during the year for:
 
 
 
Interest
$
134

 
$
184

Income taxes
34,123

 
29,003

Operating lease liabilities
5,076

 

 
 
 
 
Non-cash operating activities:
 
 
 
ROU assets obtained in exchange for lease liabilities(1)
$
25,965

 
$

 
 
 
 
Non-cash investing activities:
 
 
 
Unpaid purchases of property, plant and equipment
$
4,170

 
$
2,023

 
 
 
 
Non-cash financing activities:
 
 
 
       Unsettled common stock proceeds from option exercises
$

 
$
259

 
 
 
 
Reconciliation of cash, cash equivalents and restricted cash:
 
 
 
Cash and cash equivalents
$
513,360

 
$
493,488

Restricted cash
152

 
157

Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows
$
513,512

 
$
493,645


______________
(1)
In connection with its adoption of ASC 842 on December 30, 2018, the Company recorded a lessee operating lease ROU asset of $22.5 million. See “Recently Adopted Accounting Pronouncements” to these condensed consolidated financial statements for additional information related to the Company’s adoption of ASC 842.