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Stock-Based Compensation (Details 2) (Stock options, USD $) In Thousands, except Per Share data, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014
Options Outstanding |
Number Outstanding (in shares) | 495 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions
Weighted Average Remaining Contractual Life | 7 years 10 months 2 days
Weighted Average Exercise Price (in dollars per share) | $ 47.34 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1
Options Exercisable |
Number Exercisable (in shares) | 128 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Weighted Average Exercise Price (in dollars per share) | $ 40.04 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1
$26.34-$37.41 |
Information about options outstanding |
Low end of exercise price range (in dollars per share) | $ 26.34 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
High end of exercise price range (in dollars per share) | $ 37.41 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
Options Outstanding |
Number Outstanding (in shares) | 191 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
Weighted Average Remaining Contractual Life | 6 years 9 months 22 days
Weighted Average Exercise Price (in dollars per share) | $ 34.40 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
Options Exercisable |
Number Exercisable (in shares) | 85 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
Weighted Average Exercise Price (in dollars per share) | $ 33.08 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars26.34ToDollars37.41Member
$40.17-$47.21 |
Information about options outstanding |
Low end of exercise price range (in dollars per share) | $ 40.17 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
High end of exercise price range (in dollars per share) | $ 47.21 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
Options Outstanding |
Number Outstanding (in shares) | 14 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
Weighted Average Remaining Contractual Life | 2 years 5 months 27 days
Weighted Average Exercise Price (in dollars per share) | $ 43.38 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
Options Exercisable |
Number Exercisable (in shares) | 4 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
Weighted Average Exercise Price (in dollars per share) | $ 42.13 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars40.17ToDollars47.21Member
$54.76-$54.76 |
Information about options outstanding |
Low end of exercise price range (in dollars per share) | $ 54.76 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
High end of exercise price range (in dollars per share) | $ 54.76 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
Options Outstanding |
Number Outstanding (in shares) | 160 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
Weighted Average Remaining Contractual Life | 8 years 3 months 11 days
Weighted Average Exercise Price (in dollars per share) | $ 54.76 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
Options Exercisable |
Number Exercisable (in shares) | 31 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
Weighted Average Exercise Price (in dollars per share) | $ 54.76 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars54.76ToDollars54.76Member
$57.47-$60.10 |
Information about options outstanding |
Low end of exercise price range (in dollars per share) | $ 57.47 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member
High end of exercise price range (in dollars per share) | $ 60.10 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member
Options Outstanding |
Number Outstanding (in shares) | 130 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfOutstandingOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member
Weighted Average Remaining Contractual Life | 9 years 4 months 21 days
Weighted Average Exercise Price (in dollars per share) | $ 57.68 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeOutstandingOptionsWeightedAverageExercisePriceBeginningBalance1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member
Options Exercisable |
Number Exercisable (in shares) | 8 us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member
Weighted Average Exercise Price (in dollars per share) | $ 57.95 us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageExercisePrice1 / us-gaap_PlanNameAxis = us-gaap_EmployeeStockOptionMember / us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansByExercisePriceRangeAxis = wts_ExercisePriceRangeFromDollars57.47ToDollars60.10Member

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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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