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Basis of Presentation and Summary of Significant Accounting Policies (Tables) | 3 Months Ended
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Mar. 31, 2018
Accounting Policies [Abstract] |
Allowance for Doubtful Accounts Roll Forward | The following is a summary of the activity of the Company’s allowance for doubtful accounts for the three months ended March 31, 2018 and April 1, 2017 (in thousands):
|  | Balance at Beginning of Period |  |  | Additions |  |  | Deduction |  |  | Balance at End of Period |
Allowance for Doubtful Accounts |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2018 |  | $ | 6,109 |  |  | $ | 1,056 |  |  | $ | (1,033 | ) |  | $ | 6,132 |
April 1, 2017 |  | $ | 5,140 |  |  | $ | 636 |  |  | $ | (643 | ) |  | $ | 5,133 |
Summary of Assets and Liabilities Measured at Fair Value on Recurring Basis | The following table represents the Company’s assets and liabilities measured at fair value on a recurring basis at March 31, 2018 (in thousands):
|  | Total at March 31, 2018 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 425,032 |  |  | $ | — |  |  | $ | 425,032 |  |  | $ | — |
Foreign government securities |  |  | 6,947 |  |  |  | — |  |  |  | 6,947 |  |  |  | — |
Corporate debt securities |  |  | 1,292,878 |  |  |  | — |  |  |  | 1,292,878 |  |  |  | — |
Time deposits |  |  | 301,277 |  |  |  | — |  |  |  | 301,277 |  |  |  | — |
Equity securities |  |  | 147 |  |  |  | — |  |  |  | 147 |  |  |  | — |
Waters 401(k) Restoration Plan assets |  |  | 35,762 |  |  |  | 35,762 |  |  |  | — |  |  |  | — |
Foreign currency exchange contracts |  |  | 129 |  |  |  | — |  |  |  | 129 |  |  |  | — |
Total |  | $ | 2,062,172 |  |  | $ | 35,762 |  |  | $ | 2,026,410 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | $ | 3,399 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,399 |
Foreign currency exchange contracts |  |  | 730 |  |  |  | — |  |  |  | 730 |  |  |  | — |
Total |  | $ | 4,129 |  |  | $ | — |  |  | $ | 730 |  |  | $ | 3,399 |
The following table represents the Company’s assets and liabilities measured at fair value on a recurring basis at December 31, 2017 (in thousands):
|  | Total at December 31, 2017 |  |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  | Significant Other Observable Inputs (Level 2) |  |  | Significant Unobservable Inputs (Level 3) |
Assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. Treasury securities |  | $ | 591,988 |  |  | $ | — |  |  | $ | 591,988 |  |  | $ | — |
Foreign government securities |  |  | 6,952 |  |  |  | — |  |  |  | 6,952 |  |  |  | — |
Corporate debt securities |  |  | 1,975,160 |  |  |  | — |  |  |  | 1,975,160 |  |  |  | — |
Time deposits |  |  | 371,511 |  |  |  | — |  |  |  | 371,511 |  |  |  | — |
Equity securities |  |  | 147 |  |  |  | — |  |  |  | 147 |  |  |  | — |
Waters 401(k) Restoration Plan assets |  |  | 35,645 |  |  |  | 35,645 |  |  |  | — |  |  |  | — |
Foreign currency exchange contracts |  |  | 566 |  |  |  | — |  |  |  | 566 |  |  |  | — |
Total |  | $ | 2,981,969 |  |  | $ | 35,645 |  |  | $ | 2,946,324 |  |  | $ | — |
Liabilities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Contingent consideration |  | $ | 3,247 |  |  | $ | — |  |  | $ | — |  |  | $ | 3,247 |
Foreign currency exchange contracts |  |  | 182 |  |  |  | — |  |  |  | 182 |  |  |  | — |
Total |  | $ | 3,429 |  |  | $ | — |  |  | $ | 182 |  |  | $ | 3,247 |
Fair Value of Forward Foreign Exchange Contracts | The Company’s foreign currency exchange contracts included in the consolidated balance sheets are classified as follows (in thousands):
|  | March 31, 2018 |  |  | December 31, 2017 |
Other current assets |  | $ | 129 |  |  | $ | 566 |
Other current liabilities |  | $ | 730 |  |  | $ | 182 |
Gains (Losses) on Foreign Exchange Contracts | The following is a summary of the activity included in cost of sales in the statements of operations related to the foreign currency exchange contracts (in thousands):
|  | Three Months Ended |
|  | March 31, 2018 |  |  | April 1, 2017 |
Realized gains (losses) on closed contracts |  | $ | 1,937 |  |  | $ | (1,438 | )
Unrealized losses on open contracts |  |  | (985 | ) |  |  | (132 | )
Cumulative net pre-tax gains (losses) |  | $ | 952 |  |  | $ | (1,570 | )
Summary of Activity of Company's Accrued Warranty Liability | The following is a summary of the activity of the Company’s accrued warranty liability for the three months ended March 31, 2018 and April 1, 2017 (in thousands):
|  | Balance at Beginning of Period |  |  | Accruals for Warranties |  |  | Settlements Made |  |  | Balance at End of Period |
Accrued warranty liability: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
March 31, 2018 |  | $ | 13,026 |  |  | $ | 1,767 |  |  | $ | (2,167 | ) |  | $ | 12,626 |
April 1, 2017 |  | $ | 13,391 |  |  | $ | 1,815 |  |  | $ | (2,208 | ) |  | $ | 12,998 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68068213&loc=d3e12565-110249 + Details
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