EMPLOYEE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
EMPLOYEE BENEFIT PLANS [Abstract]
Company match	50.00%plt_CompanyMatch
Portion of employee compensation matched under 401(k)	6.00%
Non-elective company contribution as percentage of employee salary	3.00%
Vesting of matching contributions	100.00%plt_VestingOfMatchingContributions
Company contributions	$ 4.5	$ 4.2	$ 4.0

Company match on employees' first 6% of employee's compensation under 401(k) program

No definition available.

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Namespace Prefix:	plt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	plt_EmployeeBenefitPlansAbstract
Namespace Prefix:	plt_
Data Type:	xbrli:stringItemType
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- Definition

The non-elective contribution under Section 401(k) made by the Company as a percentage of the employees' base salaries.

+ References

No definition available.

+ Details

Name:	plt_NonElectiveCompanyContributionAsPercentageOfEmployeeSalary
Namespace Prefix:	plt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Portion of employee compensation matched by the Company under 401(k) program.

+ References

No definition available.

+ Details

Name:	plt_PortionOfEmployeeCompensationMatchedUnder401K
Namespace Prefix:	plt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Period of time under which matching contributions are vested under the company's defined contribution benefit plan under Section 401(k).

+ References

No definition available.

+ Details

Name:	plt_VestingOfMatchingContributions
Namespace Prefix:	plt_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration