The realized income tax benefit.

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The amount of adjustment to stockholders' equity associated with an employee's income tax withholding obligation as part of a net-share settlement of a share-based award.

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No definition available.

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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-Name Accounting Standards Codification

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-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

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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

Unrecognized cost of unvested options awarded to employees as compensation.

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No definition available.

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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.

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

-Publisher FASB

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-Glossary Financing Activities

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-Section 45

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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).

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- Definition

Number of additional shares authorized for issuance under an established share-based compensation plan.

+ References

No definition available.

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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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-Paragraph 2

-Subparagraph (a)(3)

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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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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-Section 50

-Paragraph 2

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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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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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

For net-share settlement of share-based awards when the employer settles employees' income tax withholding obligations, this element represents the number of shares the employees use to repay the employer.

+ References

No definition available.

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Number of share options (or share units) exercised during the current period.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

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The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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Equity Compensation Plans (Additional Information) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	0 Months Ended	12 Months Ended
	Apr. 27, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Apr. 30, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of additional shares authorized	1,200,000
Stock based compensation expense		$ 2.8	$ 1.8	$ 1.4
Number of options granted		131,800	75,279	146,500
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 11.85	$ 9.41	$ 7.79
Shares Exercised		(277,006)	(158,322)	(129,675)
Total intrinsic value for options exercised		5.0	1.0	0.7
Realized Income Tax Benefit		2.5ldl_RealizedIncomeTaxBenefit	1.0ldl_RealizedIncomeTaxBenefit	0.5ldl_RealizedIncomeTaxBenefit
Cash received from exercise of stock option		2.5	1.5	1.0
Weighted average expected amortization period		3 years 1 month 6 days
Restricted shares Granted		253,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value		2.2	1.6	0.6
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Stock Options		4.8
Stock Option Plan 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share options and restricted shares authorized	1,750,000
Stock Repurchase Program, Number of Shares Authorized to be Repurchased		267,089			1,000,000
Performance Based Restricted Stock Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares Granted		204,800	95,090	114,500
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value		$ 22.93	$ 16.01	$ 12.56
Total unrecognized compensation cost		2.0
Weighted average expected amortization period		2 years 2 months 12 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period		6,212	10,565	171,369
Shares Paid for Tax Withholding for Share Based Compensation		33,252
Shares Paid for Tax Withholding for Share Based Compensation, Value of Shares Withheld		0.8
Time Based Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted shares Granted		48,649	29,480	73,750
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Realized Income Tax Benefit		$ 1.8	$ 0.3	$ 0.2