Represents the number of separate incentive compensation programs within a incentive compensation plan.

No definition available.

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- Definition

Gross number of share that can be purchased with the annual option.

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No definition available.

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Period which an employee's right to exercise an award.

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No definition available.

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Represents information pertaining to the period over which average annual return on invested capital is measured in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Represents information pertaining to the period over which total shareholder return is measured in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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No definition available.

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Represents the number of share based compensation plans utilized by the entity.

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No definition available.

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Represents the number of shares to be issued upon exercise of outstanding options, warrants and rights under the equity-based compensation plan.

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No definition available.

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Represents information pertaining to the weighted percentage of the entities comprising each index considered for calculation of total shareholder return under share-based compensation.

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No definition available.

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The period of time within for an option to purchase shares is exercised for eligibility to participate in a reload feature if payment is made in shares of the entity's stock.

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No definition available.

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The ratio to convert the original option price when the reload feature is utilized.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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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.

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No definition available.

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Number of additional shares authorized for issuance under an established share-based compensation plan.

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No definition available.

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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).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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- Definition

For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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Gross number of share options (or share units) granted during the period.

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No definition available.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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No definition available.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Purchase price of common stock expressed as a percentage of its fair value.

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No definition available.

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Number of share options (or share units) exercised during the current period.

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SHARE-BASED AWARDS - SUMMARY (Details) $ / shares in Units, $ in Thousands		3 Months Ended			12 Months Ended
	Jan. 28, 2010 shares	Mar. 31, 2015 $ / shares shares	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2015 USD ($) plan $ / shares shares	Dec. 31, 2014 $ / shares shares
Stock options
Activity in the entity's stock option plans
Outstanding, beginning of period (in shares)		852,000			852,000
Exercised (in shares)					(386,000)
Forfeited and expired (in shares)					(5,000)
Outstanding, end of period (in shares)					461,000	852,000
Exercisable (in shares)					461,000
Weighted average exercise price
Outstanding, weighted average exercise price, beginning of period (in dollars per share) \| $ / shares		$ 21.24			$ 21.24
Exercised, weighted average exercise price (in dollars per share) \| $ / shares					20.44
Forfeited and expired, weighted average exercise price (in dollars per share) \| $ / shares					22.80
Outstanding, weighted average exercise price, end of period (in dollars per share) \| $ / shares					21.90	$ 21.24
Exercisable, weighted average exercise price (in dollars per share) \| $ / shares					$ 21.90
Outstanding, weighted average contractual life					3 years 9 months 18 days
Exercisable, weighted average contractual life					3 years 9 months 18 days
Outstanding, aggregate intrinsic value (in dollars) \| $					$ 9,555
Exercisable, aggregate intrinsic value (in dollars) \| $					$ 9,555
Restricted Stock Units \| Automatic Grant Program \| Minimum
Share-based compensation
Vesting period of awards granted					1 year
2007 Plan
Share-based compensation
Common stock initially available for future issuance (in shares)					2,200,000
Additional shares authorized for issuance	2,200,000
Number of separate incentive compensation programs \| plan					4
Number of share based compensation plans within the entity's incentive compensation programs \| plan					3
2007 Plan \| Discretionary Grant Program
Share-based compensation
Minimum exercise price as a percentage of fair market value of common stock					100.00%
Exercisable period					3 years
Expiration Term					10 years
2007 Plan \| Stock Issuance Program \| Performance Vesting
Share-based compensation
Average ROIC, period for measurement		3 years	3 years	3 years
TSR modifier, period for measurement				3 years
Weighted percentage of the entities comprising each index considered for calculation of total shareholder return				50.00%
Continuous service period for vesting of shares issuable on the basis of the performance-vesting criteria				3 years
2007 Plan \| Stock options
Activity in the entity's stock option plans
Outstanding, beginning of period (in shares)		657,000			657,000
Exercised (in shares)					(254,000)
Outstanding, end of period (in shares)					403,000	657,000
Exercisable (in shares)					403,000
2007 Plan \| Time-Based Restricted Stock Units \| Stock Issuance Program
Share-based compensation
Vesting period of awards granted					3 years
2007 Plan \| Performance-Based Restricted Stock Units \| Stock Issuance Program
Share-based compensation
Vesting period of awards granted					3 years
2007 Plan \| Restricted Stock Units
Share-based compensation
Common stock initially available for future issuance (in shares)					8,700,000
Common stock available for future issuance (in shares)					5,800,000
Number of shares to be issued upon exercise of outstanding options, warrants and rights					500,000
Options granted, weighted average grant-date fair value (in dollars per share) \| $ / shares					$ 37.19
2007 Plan \| Restricted Stock Units \| Automatic Grant Program \| Maximum
Share-based compensation
Vesting period of awards granted					3 years
1998 Plan \| Stock options
Activity in the entity's stock option plans
Outstanding, beginning of period (in shares)		132,000			132,000
Exercised (in shares)					(85,000)
Forfeited and expired (in shares)					(5,000)
Outstanding, end of period (in shares)					42,000	132,000
Exercisable (in shares)					42,000
Predecessor Plans 1998 Plan \| Stock options
Share-based compensation
Vesting period of awards granted					3 years
Expiration Term					10 years
Period of time within for an option to be exercised for eligibility for reload feature and new stock option grant					5 years
Ratio to convert original option price under reload feature						1.5
Activity in the entity's stock option plans
Granted (in shares)					0
Predecessor Plans 1998 Plan \| Time-Based Restricted Stock Units
Share-based compensation
Vesting period of awards granted					3 years
Predecessor Plans 1998 Plan \| Performance-Based Restricted Stock Units
Share-based compensation
Vesting period of awards granted					1 year
Predecessor Plan 1998 Directors' Plan \| Stock options
Share-based compensation
Number of shares that can be purchased with the annual option					8,000
Exercisable period					3 years
Activity in the entity's stock option plans
Outstanding, beginning of period (in shares)		63,000			63,000
Exercised (in shares)					(47,000)
Outstanding, end of period (in shares)					16,000	63,000
Exercisable (in shares)					16,000