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v3.19.1

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 30, 2019 | Mar. 31, 2018
Cash flows from operating activities: |  |
Net income | $ 108,986 | $ 111,951
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock-based compensation | 9,941 | 9,892
Deferred income taxes | 1,442 | 1,071
Depreciation | 12,006 | 16,083
Amortization of intangibles | 12,758 | 12,557
Change in operating assets and liabilities: |  |
Decrease in accounts receivable | 59,331 | 40,588
Increase in inventories | (44,438) | (28,101)
Increase in other current assets | (3,547) | (13,049)
Decrease (increase) in other assets | 4,637 | (4,409)
Decrease in accounts payable and other current liabilities | (33,485) | (34,258)
Increase in deferred revenue and customer advances | 57,539 | 45,096
Effect of the 2017 Tax & Jobs Act | (3,229) | 12,450
(Decrease) increase in other liabilities | (6,162) | 5,970
Net cash provided by operating activities | 175,779 | 175,841
Cash flows from investing activities: |  |
Additions to property, plant, equipment and software capitalization | (25,666) | (15,992)
Investment in unaffiliated companies |  | (3,215)
Purchases of investments | (26,732) | (170,041)
Maturities and sales of investments | 486,437 | 1,085,087
Net cash provided by investing activities | 434,039 | 895,839
Cash flows from financing activities: |  |
Proceeds from debt issuances | 166 | 81
Payments on debt | (80) | (750,000)
Proceeds from stock plans | 27,631 | 24,287
Purchases of treasury shares | (753,105) | (282,370)
Proceeds from derivative contracts | 2,254 | 1,937
Net cash used in financing activities | (723,134) | (1,006,065)
Effect of exchange rate changes on cash and cash equivalents | 2,006 | 8,588
(Decrease) increase in cash and cash equivalents | (111,310) | 74,203
Cash and cash equivalents at beginning of period | 796,280 | 642,319
Cash and cash equivalents at end of period | $ 684,970 | $ 716,522

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- Definition Increase (decrease) in tax assets and liabilities related to Tax Cuts and Jobs Act of 2017. + References No definition available. + Details
Name: | wat_IncreaseDecreaseInTaxAssetsAndLiabilitiesRelatedToTaxCutsAndJobsActOf2017
Namespace Prefix: | wat_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration