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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 29, 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 June 29, 2019:
 
 
 
 
 
 
 
 
 
Reported as
 
Adjusted Basis
Cost
 
Gross Unrealized
Gains
 
Gross Unrealized
(Losses)
 
Estimated
Fair Value
 
Cash and Cash Equivalents
 
Short-Term
Investments
Cash
$
408,784

 
$

 
$

 
$
408,784

 
$
408,784

 
$

Level 1:
 
 
 
 
 
 
 
 
 
 
 
Certificates of deposit
180,000

 

 

 
180,000

 

 
180,000

               Subtotal
180,000

 

 

 
180,000

 

 
180,000

Level 2:
 
 
 
 
 
 
 
 
 
 
 
          None

 

 

 

 

 

Level 3:
 
 
 
 
 
 
 
 
 
 
 
          None

 

 

 

 

 

Total assets measured at fair value
$
588,784

 
$

 
$

 
$
588,784

 
$
408,784

 
$
180,000


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):
 
June 29,
2019
 
December 29,
2018
Building and building improvements
$
91,595

 
$
88,449

Machinery and equipment
58,077

 
54,525

Land
40,216

 
23,762

Aircraft and vehicles
25,595

 
25,555

Computer equipment
18,649

 
16,582

Leasehold improvements
17,167

 
16,428

Tooling
14,742

 
14,212

Furniture and office equipment
10,670

 
10,459

Demonstration units
474

 
470

Construction-in-progress (CIP)
32,125

 
13,320

     Total property and equipment
309,310

 
263,762

Accumulated depreciation and amortization
(106,500
)
 
(97,790
)
     Property and equipment, net
$
202,810

 
$
165,972


Changes in Product Warranty Accrual
Changes in the product warranty accrual were as follows (in thousands):
 
Six Months Ended
 
June 29,
2019
 
June 30,
2018
Warranty accrual, beginning of period
$
1,910

 
$
1,149

Accrual for warranties issued
1,877

 
643

Changes to pre-existing warranties (including changes in estimates)(1)
1,601

 
551

Settlements made
(719
)
 
(502
)
Warranty accrual, end of period
$
4,669

 
$
1,841


______________
(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):
 
Six Months Ended 
 June 29, 2019
Accumulated other comprehensive loss, beginning of period
$
(6,199
)
Unrealized gains from foreign currency translation
(285
)
Accumulated other comprehensive loss, end of period
$
(6,484
)

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
 
Six Months Ended
 
June 29,
2019
 
June 30,
2018
 
June 29,
2019
 
June 30,
2018
Net income
$
44,888

 
$
43,853

 
$
94,210

 
$
89,483

Basic net income per share:
 
 
 
 
 
 
 
Weighted-average shares outstanding - basic
53,356

 
51,999

 
53,283

 
52,047

Net income per basic share
$
0.84

 
$
0.84

 
$
1.77

 
$
1.72

Diluted net income per share:
 
 
 
 
 
 
 
Weighted-average shares outstanding - basic
53,356

 
51,999

 
53,283

 
52,047

Diluted share equivalent: stock options, RSUs and PSUs
3,710

 
3,743

 
3,657

 
3,795

Weighted-average shares outstanding - diluted
57,066

 
55,742

 
56,940

 
55,842

Net income per diluted share
$
0.79

 
$
0.79

 
$
1.65

 
$
1.60


Supplemental Cash Flow Information
Supplemental cash flow information includes the following (in thousands):
 
Six Months Ended
 
June 29,
2019
 
June 30,
2018
Cash paid during the year for:
 
 
 
Interest
$
73

 
$
229

Income taxes
26,975

 
21,771

Capitalized operating leases
3,409

 

 
 
 
 
Non-cash operating activities:
 
 
 
ROU assets obtained in exchange for lease liabilities(1)
$
24,093

 
$

 
 
 
 
Non-cash investing activities:
 
 
 
Unpaid purchases of property, plant and equipment
$
1,216

 
$
663

 
 
 
 
Non-cash financing activities:
 
 
 
       Unsettled common stock proceeds from option exercises
$
283

 
$

 
 
 
 
Reconciliation of cash, cash equivalents and restricted cash:
 
 
 
Cash and cash equivalents
$
408,784

 
$
429,647

Restricted cash
155

 
147

Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows
$
408,939

 
$
429,794


______________
(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.