The additional issuance of principal amount of debt instrument.

No definition available.

Name:	layn_DebtInstrumentAdditionalIssuancePrincipalAmount
Namespace Prefix:	layn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The minimum liquidity amount to be maintained under credit agreement including the remaining amount available for borrowing under the revolving credit facility plus unrestricted cash.

+ References

No definition available.

+ Details

Name:	layn_MinimumLiquidityAmountToBeMaintainedUnderCreditAgreement
Namespace Prefix:	layn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Proceeds From Additional Issuance Of Debt

+ References

No definition available.

+ Details

Name:	layn_ProceedsFromAdditionalIssuanceOfDebt
Namespace Prefix:	layn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

Name:	us-gaap_LettersOfCreditOutstandingAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(b),22(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 19, 22

-Article 5

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityRemainingBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Subsequent Event (Detail) (USD $) In Millions, unless otherwise specified		0 Months Ended		0 Months Ended				0 Months Ended
	Jul. 31, 2013 Credit Agreement [Member]	Nov. 12, 2013 Subsequent Event [Member] Credit Agreement [Member]	Nov. 15, 2013 Subsequent Event [Member] Credit Agreement [Member]	Dec. 05, 2013 Subsequent Event [Member] 4.25% Convertible Senior Notes due 2018 [Member]	Nov. 05, 2013 Subsequent Event [Member] 4.25% Convertible Senior Notes due 2018 [Member]	Nov. 12, 2013 Subsequent Event [Member] 4.25% Convertible Senior Notes due 2018 [Member]	Nov. 05, 2013 Subsequent Event [Member] 4.25% Convertible Senior Notes due 2018 [Member] Maximum [Member]	Nov. 12, 2013 Subsequent Event [Member] Convertible Notes Offering [Member]
Subsequent Event [Line Items]
Aggregate principal amount					$ 110.0	$ 110.0
Debt instrument stated interest rate					4.25%	4.25%
Net proceeds from issuance of notes					105.2			106.4
Amount available for borrowing under the facility			71.5
Maximum borrowing capacity	300.0	150.0
Outstanding letters of credit			28.5
Minimum liquidity		50.0
Additional aggregate principal amount							15
Proceeds from additional issuance of notes				$ 14.6