XML 87 R73.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Employee Benefit Plans - 401K Contribution and Supplemental Compensation agreement (Details) - USD ($) |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Aug. 18, 2015 | Sep. 30, 2015 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015 | Sep. 27, 2015
Employee Benefit Plans |  |  |  |  |  |
Base contribution as a percentage of employee gross pay (as a percent) |  |  | 2.00% |  |  |
Employer maximum match of an employee's contributions of first 4% of eligible compensation (as a percent) |  |  | 100.00% |  |  |
Percentage of eligible compensation, matched 100% by employer |  |  | 4.00% |  |  |
Company's matching contributions under certain 401(k) savings plans |  |  | $ 5,000,000 | $ 5,400,000 | $ 4,300,000 |
Charges for pension plans |  |  | $ 4,100,000 | $ 4,500,000 | $ 4,900,000 |
Deferred tax assets on cumulative actuarial losses |  |  |  |  |  | $ 23,000,000
SERP |  |  |  |  |  |
Employee Benefit Plans |  |  |  |  |  |
Settlement charge |  | $ 43,200,000 |  |  |  |
Timothy P. Horne |  |  |  |  |  |
Components of net periodic benefit cost |  |  |  |  |  |
Consulting service payment (as a percent) |  |  |  |  | 50.00% |
Period of annual base salary | 3 years |  |  |  |  |
Annual payment for consulting services | $ 400,000 |  |  |  |  |
Payments for consulting service as per compensation agreement | 598,562 |  |  |  |  |
Lump sum buyout of consulting services lifetime payment obligation | $ 6,000,000 |  |  |  |  |
Payment for lump-sum buyout of lifetime consulting service payment obligation |  | $ 6,000,000 |  |  |  |
Pre-tax charge for lump-sum buyout of lifetime payment obligation |  |  |  |  | $ 5,000,000 |

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_DefinedBenefitPlanNetPeriodicBenefitCostAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of plan assets that relate to an irrevocable action that relieves the employer, or plan, of primary responsibility for a benefit obligation and eliminates risks related to the obligation and the assets used to effect settlement. Includes, but is not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified pension benefits and purchasing annuity contracts to cover vested benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 35 -Paragraph 123 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937487&loc=d3e36068-114959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 63 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12551-114930 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 15 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=7577095&loc=d3e8001-114927 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 60 -Section 35 -Paragraph 126 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937487&loc=d3e36091-114959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(8) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 30 -Section 35 -Paragraph 66 -Subparagraph B -URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12688-114930 + Details
Name: | us-gaap_DefinedBenefitPlanSettlementsPlanAssets
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of the cost recognized during the period for defined contribution plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the annual payment for consulting services. + References No definition available. + Details
Name: | wts_AnnualPaymentForConsultingServices
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the annual base salary period for calculating consulting service payment. + References No definition available. + Details
Name: | wts_AnnualSalaryBasePeriodForCalculatingConsultingServicePayment
Namespace Prefix: | wts_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of deferred tax assets associated to cumulative actuarial losses . + References No definition available. + Details
Name: | wts_DefinedBenefitPlanDeferredTaxAssetsAssociatedToActuarialLosses
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Represents the base contribution as a percentage of employee gross pay which the employer may contribute to a defined contribution plan. + References No definition available. + Details
Name: | wts_DefinedContributionPlanBaseContributionByEmployerPercent
Namespace Prefix: | wts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the employer maximum matching contribution of the first level of an employee's contributions. + References No definition available. + Details
Name: | wts_DefinedContributionPlanEmployerMatchLevelOneMaximum
Namespace Prefix: | wts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the lump-sum payment made for buyout of lifetime payment obligation. + References No definition available. + Details
Name: | wts_LumpSumBuyoutOfLifetimePaymentObligation
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition The cash outflow for lump-sum payment of company's ongoing lifetime payment obligations. + References No definition available. + Details
Name: | wts_PaymentForLumpSumBuyoutOfLifetimePaymentObligation
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of cash paid during the period for consulting services. + References No definition available. + Details
Name: | wts_PaymentsForConsultingServices
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Represents the percentage of annual base salary for payment of consulting service as per compensation agreement. + References No definition available. + Details
Name: | wts_PercentageOfAnnualBaseSalaryForConsultingServicesPayment
Namespace Prefix: | wts_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the pre-tax charge of lump-sum buyout of lifetime payment obligations. + References No definition available. + Details
Name: | wts_PreTaxChargeOfLumpSumBuyoutOfLifetimePaymentObligation
Namespace Prefix: | wts_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_DefinedBenefitPlansDisclosuresDefinedBenefitPlansAxis=us-gaap_SupplementalEmployeeRetirementPlanDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_TitleOfIndividualAxis=wts_FormerChiefExecutiveOfficerAndPresidentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |