EMPLOYEE BENEFIT PLANS (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Company match	50.00%
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%
Defined Contribution Plan, Cost Recognized	$ 3.8	$ 3.7	$ 3.7

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

No definition available.

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

- 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

- Details

Name:	us-gaap_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
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 Statement of Financial Accounting Standard (FAS)

-Number 132R

-Paragraph 11

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: 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=6414718&loc=d3e28014-114942

+ Details

Name:	us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration