Equity-Based Compensation (Narrative) (Details) (USD $)
In Thousands, except Per Share data, unless otherwise specified |
12 Months Ended | ||
---|---|---|---|
Jan. 03, 2015
|
Dec. 28, 2013
|
Dec. 29, 2012
|
|
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Equity-based compensation expense | $ 9,805us-gaap_AllocatedShareBasedCompensationExpense | $ 7,624us-gaap_AllocatedShareBasedCompensationExpense | $ 10,210us-gaap_AllocatedShareBasedCompensationExpense |
Equity-based compensation related tax benefit | 3,308us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 2,575us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense | 3,554us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense |
Total shares authorized under the plan | 10,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized | ||
Total awards granted | 6,790us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod | ||
Awards canceled | 1,143us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOtherShareIncreaseDecrease | ||
Weighted-average grant date fair value | $ 18.91us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 17.59us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue | $ 15.35us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue |
Total intrinsic value of stock options and stock-settled stock appreciation rights exercised | 51,795us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 32,837us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue | 20,590us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue |
Total fair value of equity awards vested | $ 7,568us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue | $ 8,096us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue | $ 10,211us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue |
Stock Appreciation Rights (SARs) [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total awards granted |
6,668us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_StockAppreciationRightsSARSMember |
||
Stock Options [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total awards granted |
8us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_EmployeeStockOptionMember |
||
Deferred Stock Units [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Total awards granted |
114us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriod / us-gaap_AwardTypeAxis = us-gaap_RestrictedStockUnitsRSUMember |
||
Officers Upon Hire Or Promotion [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting percentage |
20.00%usna_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_TitleOfIndividualAxis = usna_OfficersUponHireOrPromotionMember |
||
Expiration from grant date | 5 years 6 months | ||
Officers [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting percentage |
50.00%usna_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_TitleOfIndividualAxis = us-gaap_OfficerMember |
||
Directors [Member] | |||
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |||
Vesting percentage |
25.00%usna_ShareBasedCompensationArrangementByShareBasedPaymentAwardVestingPercentage / us-gaap_TitleOfIndividualAxis = us-gaap_DirectorMember |
X | ||||||||||
- Definition
Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Details
|
X | ||||||||||
- Definition
The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Net number of share options (or share units) granted during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
X | ||||||||||
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Expiration Term No definition available.
|
X | ||||||||||
- Definition
Share Based Compensation Arrangement By Share Based Payment Award Vesting Percentage No definition available.
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|
X | ||||||||||
- Details
|