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Period Following Director's Term In Which Stock Awards May Be Settled

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Restricted Stock Units, Number of Securities Into Which Each RSU May Be Converted

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Exercisability Period, from Date of Grant

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock and Restricted Stock Units, Additional Disclosures [Abstract]

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Award Settlement Period

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Increase to Plan Term

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No definition available.

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Options and Other Equity Instruments, Vested in Period, Fair Value

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No definition available.

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- Definition

Unrecognized cost of unvested share-based compensation awards.

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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

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- Definition

Disclosure of the aggregate tax benefit realized from the exercise of stock options and the conversion of similar instruments during the annual period.

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- Definition

The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

+ 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 (j)
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3255-108585

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Financing Activities
-URI http://asc.fasb.org/extlink&oid=6513228

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

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- Definition

Additional share-based compensation cost recognized as a result of an occurrence of an event that accelerates its recognition.

+ References

No definition available.

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- Definition

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.

+ References

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- Definition

The number of grants made 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).

+ References

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- Definition

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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- 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.

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No definition available.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

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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- 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).

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- Definition

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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- 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.

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- Definition

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

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No definition available.

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- Definition

Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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No definition available.

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- Definition

Percentage of vesting of share-based compensation awards.

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- Definition

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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Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands								1 Months Ended	12 Months Ended
	Oct. 28, 2015 $ / shares shares	Aug. 04, 2015 shares	Jul. 01, 2015 $ / shares shares	Jun. 01, 2015 USD ($)	May. 11, 2015 $ / shares shares	Apr. 22, 2015 shares	May. 31, 2014 shares	Jun. 30, 2014 shares	Mar. 31, 2016 USD ($) $ / shares shares	Mar. 31, 2015 USD ($) $ / shares shares	Mar. 31, 2014 USD ($) $ / shares shares	Aug. 04, 2014 director
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation costs charged against income \| $									$ 9,954	$ 6,918	$ 5,146
Tax benefit recognized from share-based compensation expense \| $									$ 3,500	$ 1,900	$ 1,500
Restricted Shares
Options granted, shares									208,200	317,900	227,700
Options granted, weighted-average exercise price (in USD per share) \| $ / shares									$ 42.13	$ 33.54	$ 29.94
Number of directors, board of directors \| director												6
Options
Options exercised, intrinsic value \| $									$ 8,600	$ 9,300	$ 14,000
Share-based compensation expense, not yet recognized \| $									$ 10,100
Share-based compensation expense, not yet recognized, period for recognition									12 months 12 days
Fair value of awards vested during period \| $									$ 7,000	4,700	3,400
Proceeds from exercise of stock awards \| $									6,689	3,954	5,907
Income tax benefit realized from exercise of stock awards \| $									$ 2,100	$ 2,200	$ 1,700
President and Chief Executive Officer
Restricted Shares
Accelerated stock-based compensation cost \| $				$ 800
Restricted common stock units granted in period, shares						57,924
Restricted Stock Units (RSUs)
Restricted Shares
Restricted common stock units granted in period, shares		2,075	2,841		185,904
Award vesting period		1 year	3 years
Period following director's term In which stock awards may be settled		6 months
Granted, weighted-average grant-date fair value (in USD per share) \| $ / shares									$ 42.41	$ 33.33	$ 30.19
Restricted Stock Units (RSUs) \| Tranche 1
Restricted Shares
Restricted common stock units granted in period, shares					163,404
Award vesting period					3 years
Restricted Stock Units (RSUs) \| Tranche 2
Restricted Shares
Restricted common stock units granted in period, shares					22,500
Award vesting period					3 years
Award vesting rights, percentage					33.30%
Restricted Stock Units (RSUs) \| Chief Financial Officer
Restricted Shares
Restricted common stock units granted in period, shares	6,612
Award vesting period	3 years
Restricted Stock Units (RSUs) \| Employee
Restricted Shares
Award vesting period									3 years
Restricted Stock Units (RSUs) \| Director
Restricted Shares
Restricted common stock units granted in period, shares					362
Award vesting period									1 year
Award settlement period									6 months
Restricted stock units, number of securities into which each RSU may be converted		1
Stock Options
Restricted Shares
Restricted common stock units granted in period, shares			13,861
Options granted, shares					186,302
Award vesting period			3 years		3 years
Award vesting rights, percentage			33.30%		33.30%
Expiration period			10 years
Options granted, weighted-average exercise price (in USD per share) \| $ / shares			$ 46.58		$ 41.44
Granted, weighted-average grant-date fair value (in USD per share) \| $ / shares									$ 17.24	$ 15.95	$ 13.94
Stock Options \| Chief Financial Officer
Restricted Shares
Options granted, shares	8,079
Award vesting period	3 years
Award vesting rights, percentage	33.30%
Expiration period	10 years
Options granted, weighted-average exercise price (in USD per share) \| $ / shares	$ 50.42
Stock Options \| Minimum
Restricted Shares
Award vesting period									3 years
Stock Options \| Maximum
Restricted Shares
Award vesting period					10 years				5 years
Options
Award exercisability period, from date of grant (not greater than)									10 years
Restricted Shares
Restricted Shares
Restricted common stock units granted in period, shares									266,100	106,900	126,600
Granted, weighted-average grant-date fair value (in USD per share) \| $ / shares									$ 42.41	$ 33.33	$ 30.19
Restricted Shares \| Minimum
Restricted Shares
Award vesting period									3 years
Restricted Shares \| Maximum
Restricted Shares
Award vesting period									5 years
2005 Long-term Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized for grant									5,000,000.0
Number of additional shares authorized under plan								1,800,000.0
Maximum number of shares awarded, per employee, annual							1,000,000	2,500,000.0
Increase to plan term								10 years
Options
Number of shares available for issuance under plan									2,600,000