Credit Facility Fixed Charge Coverage Ratio

No definition available.

Name:	ldl_CreditFacilityFixedChargeCoverageRatio
Namespace Prefix:	ldl_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Earnings before Interest, Taxes, Depreciation and Amortization

+ References

No definition available.

+ Details

Name:	ldl_EarningsBeforeInterestTaxesDepreciationAndAmortization
Namespace Prefix:	ldl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Leverage Ratio

+ References

No definition available.

+ Details

Name:	ldl_LeverageRatio
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Data Type:	xbrli:pureItemType
Balance Type:	na
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- Definition

Maximum possible value of increase in 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

No definition available.

+ Details

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Namespace Prefix:	ldl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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.

+ References

No definition available.

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtWeightedAverageInterestRate
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

+ 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 fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
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Balance Type:
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- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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- Details

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- Details

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Long-term Debt and Financing Arrangements - Additional Information (Detail)		9 Months Ended
	Jul. 07, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jul. 06, 2016 USD ($)	Dec. 31, 2015
Debt Instrument [Line Items]
Debt, weighted average interest rate percentage		1.30%		1.30%
Amended Credit Facility
Debt Instrument [Line Items]
Standby letters of credit, outstanding		$ 3,800,000
Amended Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 175,000,000	$ 175,000,000.0	$ 100,000,000.0
Line of credit facility maximum borrowing capacity possible value of increase (not to exceed)	$ 50,000,000
Credit facility fixed charge coverage ratio (not less than)		2.0
Required consolidated leverage ratio as of end of each fiscal quarter (no greater than)		3.0
Minimum required Consolidated EBITDA for preceding 12 month period		$ 30,000,000.0
Line of credit facility, remaining borrowing capacity		$ 76,200,000
Amended Credit Facility \| Revolving Credit Facility \| Federal Funds Effective Swap Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.50%
Amended Credit Facility \| Revolving Credit Facility \| Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Amended Credit Facility \| Revolving Credit Facility \| Minimum
Debt Instrument [Line Items]
Quarterly commitment fee percentage		0.175%
Amended Credit Facility \| Revolving Credit Facility \| Minimum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.15%
Amended Credit Facility \| Revolving Credit Facility \| Minimum \| Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate		0.75%
Amended Credit Facility \| Revolving Credit Facility \| Maximum
Debt Instrument [Line Items]
Quarterly commitment fee percentage		0.30%
Amended Credit Facility \| Revolving Credit Facility \| Maximum \| Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Amended Credit Facility \| Revolving Credit Facility \| Maximum \| Eurocurrency Rate
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%