PENSION PLAN (Details) (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
CHANGES IN BENEFIT OBLIGATIONS [Roll Forward]
Benefit obligation-beginning of year	$ 20,314,000	$ 23,169,000	$ 21,233,000
Service cost	23,000us-gaap_DefinedBenefitPlanServiceCost	37,000us-gaap_DefinedBenefitPlanServiceCost	35,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost	892,000us-gaap_DefinedBenefitPlanInterestCost	790,000us-gaap_DefinedBenefitPlanInterestCost	872,000us-gaap_DefinedBenefitPlanInterestCost
Actuarial loss (gain)	4,149,000	(2,614,000)	1,926,000
Benefits paid	(1,079,000)us-gaap_DefinedBenefitPlanBenefitsPaid	(1,068,000)us-gaap_DefinedBenefitPlanBenefitsPaid	(897,000)us-gaap_DefinedBenefitPlanBenefitsPaid
Benefit obligation at end of year	24,299,000	20,314,000	23,169,000
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	18,792,000	16,268,000	14,639,000
Actual return on plan assets	1,017,000	2,919,000	1,807,000
Employer contributions	270,000	673,000	719,000
Benefits paid	(1,079,000)us-gaap_DefinedBenefitPlanBenefitsPaid	(1,068,000)us-gaap_DefinedBenefitPlanBenefitsPaid	(897,000)us-gaap_DefinedBenefitPlanBenefitsPaid
Fair value of plan assets-end of year	19,000,000	18,792,000	16,268,000
BENEFIT OBLIGATION IN EXCESS OF FAIR VALUE FUNDED STATUS:	(5,299,000)	(1,522,000)	(6,901,000)
Amounts recognized in the consolidated balance sheets [Abstract]
Noncurrent liabilities	(5,299,000)	(1,522,000)	(6,901,000)
Amounts recognized in accumulated other comprehensive loss [Abstract]
Accumulated loss	(9,833,000)	(5,928,000)	(11,276,000)
Deferred income taxes	2,366,000	2,366,000	4,500,000
Accumulated other comprehensive loss	(7,467,000)	(3,562,000)	(6,776,000)
Decrease in plan benefit obligation	2,100,000
Change in mortality assumption	2,000,000linc_ChangeInMortalityAssumption
Projected period for annuitants	7 years
Projected period for non-annuitants	15 years
Accumulated benefit obligation	24,300,000	20,300,000
Components of net periodic benefit cost [Abstract]
Service cost	23,000us-gaap_DefinedBenefitPlanServiceCost	37,000us-gaap_DefinedBenefitPlanServiceCost	35,000us-gaap_DefinedBenefitPlanServiceCost
Interest cost	892,000us-gaap_DefinedBenefitPlanInterestCost	790,000us-gaap_DefinedBenefitPlanInterestCost	872,000us-gaap_DefinedBenefitPlanInterestCost
Expected return on plan assets	(1,287,000)	(1,141,000)	(1,021,000)
Recognized net actuarial loss	513,000	955,000	1,056,000
Net periodic benefit cost	141,000	641,000	942,000
Amortization of estimated net loss, transition obligation and prior service cost from accumulated other comprehensive income into net periodic benefit cost	900,000
Pension plan adjustments	3,905,000	(3,214,000)	60,000
Actuarial loss	500,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	19,000,000	18,792,000	16,268,000
Fair value of total plan assets by major asset category (in hundredths)	100.00%	100.00%	100.00%
Weighted-average assumptions used to determine benefit obligations [Abstract]
Discount rate (in hundredths)	3.66%	4.46%	3.55%
Rate of compensation increase (in hundredths)	6.75%	2.00%	1.75%
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Pension Contributions	300,000us-gaap_PensionContributions	700,000us-gaap_PensionContributions
Expected benefit payments for the plan [Abstract]
Maximum contribution by employee specified as percentage of compensation (in hundredths)	25.00%
Additional contribution by employer (in hundredths)	30.00%
Maximum percentage of compensation contributed by employer as matching contribution (in hundredths)	6.00%
Compensation expense for the 401(k) plan	1,600,000	1,900,000	2,000,000
Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	19,000,000	18,792,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	19,000,000	18,792,000
Significant Other Observable Inputs (Level 2) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Significant Unobservable Inputs (Level 3) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Equity Securities [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	9,491,000
Fair value of plan assets-end of year	9,566,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	9,566,000
Fair value of total plan assets by major asset category (in hundredths)	50.00%	51.00%	46.00%
Expected benefit payments for the plan [Abstract]
Target plan asset allocations, minimum (in hundredths)	30.00%
Target plan asset allocations, maximum (in hundredths)	70.00%
Equity Securities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	9,566,000	9,491,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	9,566,000	9,491,000
Equity Securities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Equity Securities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Fixed Income [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	5,787,000
Fair value of plan assets-end of year	6,099,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	6,099,000
Fair value of total plan assets by major asset category (in hundredths)	32.00%	31.00%	36.00%
Expected benefit payments for the plan [Abstract]
Target plan asset allocations, minimum (in hundredths)	20.00%
Target plan asset allocations, maximum (in hundredths)	60.00%
Fixed Income [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	6,099,000	5,787,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	6,099,000	5,787,000
Fixed Income [Member] \| Significant Other Observable Inputs (Level 2) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Fixed Income [Member] \| Significant Unobservable Inputs (Level 3) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
International Equities [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	3,328,000	3,484,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	3,328,000	3,484,000
Fair value of total plan assets by major asset category (in hundredths)	18.00%	18.00%	18.00%
International Equities [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	3,328,000	3,484,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	3,328,000	3,484,000
International Equities [Member] \| Significant Other Observable Inputs (Level 2) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
International Equities [Member] \| Significant Unobservable Inputs (Level 3) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Cash and Equivalents [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-beginning of year	30,000
Fair value of plan assets-end of year	7,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	7,000
Fair value of total plan assets by major asset category (in hundredths)	0.00%	0.00%	0.00%
Expected benefit payments for the plan [Abstract]
Target plan asset allocations, minimum (in hundredths)	0.00%
Target plan asset allocations, maximum (in hundredths)	10.00%
Cash and Equivalents [Member] \| Quoted Prices in Active Markets for Identical Assets (Level 1) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	7,000	30,000
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	7,000	30,000
Cash and Equivalents [Member] \| Significant Other Observable Inputs (Level 2) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Cash and Equivalents [Member] \| Significant Unobservable Inputs (Level 3) [Member]
CHANGE IN PLAN ASSETS [Roll Forward]
Fair value of plan assets-end of year	0	0
Plan assets using the fair value hierarchy [Abstract]
Fair value of plan assets	0	0
Pension Plan [Member]
Weighted-average assumptions used to determine net periodic pension cost [Abstract]
Discount rate (in hundredths)	4.46%	3.55%	4.10%
Rate of compensation increase (in hundredths)	1.13%	2.00%	4.00%
Long-term rate of return (in hundredths)	7.00%	7.00%	7.00%
Expected benefit payments for the plan [Abstract]
2015	1,132,000
2016	1,187,000
2017	1,269,000
2018	1,360,000
2019	1,390,000
Years 2020-2024	$ 7,129,000

Change in mortality assumption.

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Deferred income taxes that are recognized as increases (decreases) in other comprehensive income as they arise.

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Represents the maximum percentage of contribution by employee which is specified as percentage of compensation.

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Projected period for annuitants.

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Projected period for non-annuitants.

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The total of net gain (loss), prior service cost (credit), and transition assets (obligations), as well as minimum pension liability if still remaining, included in accumulated other comprehensive income associated with a defined benefit pension or other postretirement plan(s) because they have yet to be recognized as components of net periodic benefit cost.

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The compensation expense recognized during the period pertaining to the deferred compensation arrangement.

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For defined benefit pension plans, the actuarial present value of benefits (whether vested or nonvested) attributed by the pension benefit formula to employee service rendered before a specified date and based on employee service and compensation (if applicable) before that date. The accumulated benefit obligation differs from the projected benefit obligation in that it includes no assumption about future compensation levels. For plans with flat-benefit or nonpay-related pension benefit formulas, the accumulated benefit obligation and the projected benefit obligation are the same.

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The difference between fair value of plan assets at the end of the period and the fair value at the beginning of the period, adjusted for contributions and payments of benefits during the period, and after adjusting for taxes and other expenses, as applicable.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

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Amount before tax, after reclassification adjustments, of actuarial gain (loss) that has not been recognized in the income statement.

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Amount included in accumulated other comprehensive income (AOCI) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position, including gain (loss), prior service cost (credit), and transition asset (obligation).

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The interest rate used to adjust for the time value of money for the plan.

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Expected rate of compensation increases (for pay-related plans).

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The interest rate used to adjust for the time value of money.

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An assumption as to the rate of return on plan assets reflecting the average rate of earnings expected on the funds invested or to be invested to provide for the benefits included in the benefit obligation.

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Expected rate of compensation increases (for pay-related plans).

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1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

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Net increase or decrease in the plan benefit obligation during the reporting period.

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The amount of payments made for which participants are entitled under a pension plan, including pension benefits, death benefits, and benefits due on termination of employment. Also includes payments made under a postretirement benefit plan, including prescription drug benefits, health care benefits, life insurance benefits, and legal, educational and advisory services. This item represents a periodic decrease to the plan obligations and a decrease to plan assets.

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The increase in the fair value of plan assets from contributions made by the employer.

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Amount of benefits from a defined benefit plan expected to be paid in the five fiscal years after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of benefits from a defined benefit plan expected to be paid in the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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An amount calculated as a basis for determining the extent of delayed recognition of the effects of changes in the fair value of assets. The expected return on plan assets is determined based on the expected long-term rate of return on plan assets and the market-related value of plan assets.

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Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

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The funded status is measured as the difference between the fair value of plan assets and the benefit obligation. Will normally be the same as the net Defined Benefit Plan, Amounts Recognized in Balance Sheet, Total.

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The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time.

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The total amount of net periodic benefit cost for defined benefit plans for the period. Periodic benefit costs include the following components: service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) due to settlements or curtailments.

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Amount of net gain (loss) recognized in net periodic benefit cost due to settlements and curtailments. Curtailments result from an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services. Settlements result from an irrevocable action that relieves the employer (or the plan) of primary responsibility for a benefit obligation and eliminates significant risks related to the obligation and the assets used to effect the settlement. Examples of transactions that constitute a settlement include, but are not limited to, lump-sum cash payments to plan participants in exchange for their rights to receive specified benefits and purchasing nonparticipating annuity contracts to cover vested benefits.

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The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan.

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Target allocation maximum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Target allocation minimum percentage of investments of this type to total plan assets presented on a weighted average basis.

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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

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Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan.

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Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

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Amount after tax and reclassification adjustments, of (increase) decrease in accumulated other comprehensive (income) loss related to pension and other postretirement defined benefit plans, attributable to parent entity.

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Amount after tax of reclassification adjustment from accumulated other comprehensive income (loss) for actuarial gain (loss) related to pension and other postretirement benefit plans.

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This represents the noncurrent liability for underfunded plans recognized in the balance sheet that is associated with the defined benefit pension plans and other postretirement defined benefit plans.

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The amount of cash or cash equivalents contributed by the entity to fund its pension plans.

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