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WEIGHTED AVERAGE COMMON SHARES (Details)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Shares used to compute basic and diluted loss income per share [Abstract]    
Basic shares outstanding (in shares) 23,055,803us-gaap_WeightedAverageNumberOfSharesOutstandingBasic 22,722,721us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Dilutive effect of stock options (in shares) 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements 0us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted shares outstanding (in shares) 23,055,803us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding 22,722,721us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Stock Option 2 [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from computation of income (loss) per share (in shares) 96,968us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= linc_StockOption2Member
177,392us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= linc_StockOption2Member
Stock Option 1 [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from computation of income (loss) per share (in shares) 758,338us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= linc_StockOption1Member
587,543us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= linc_StockOption1Member
Performance Shares [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Antidilutive shares excluded from computation of income (loss) per share (in shares) 226,106us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_PerformanceSharesMember
386,063us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_PerformanceSharesMember