Annual report pursuant to Section 13 and 15(d)

Acquisitions (Pro Forma) (Details)

v2.4.1.9
Acquisitions (Pro Forma) (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Business Combinations [Abstract]    
Revenue $ 1,022,122us-gaap_BusinessAcquisitionsProFormaRevenue $ 936,785us-gaap_BusinessAcquisitionsProFormaRevenue
Net income (loss) 8,161us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax (5,475)us-gaap_BusinessAcquisitionsProFormaIncomeLossFromContinuingOperationsBeforeChangesInAccountingAndExtraordinaryItemsNetOfTax
Net loss available to common shareholders $ (9,083)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss $ (12,386)us-gaap_BusinessAcquisitionsProFormaNetIncomeLoss
Basic and diluted loss per share available to common shareholders $ (0.05)lts_BusinessAcquisitionProFormaEarningsPerShareBasicandDiluted $ (0.07)lts_BusinessAcquisitionProFormaEarningsPerShareBasicandDiluted
Weighted average common shares outstanding: Basic and diluted 185,370,262lts_ProFormaWeightedAverageSharesOutstandingBasicandDiluted [1] 186,277,160lts_ProFormaWeightedAverageSharesOutstandingBasicandDiluted [1]
Shares issued in acquisition, number of shares 3,981,684lts_NoncashorPartNoncashAcquisitionSharesIssuedNumberofShares  
[1] Includes 3,981,684 shares issued in connection with the acquisitions.