Annual report pursuant to Section 13 and 15(d)

Acquisitions (Contingent Consideration at Carrying Value) (Details)

v2.4.1.9
Acquisitions (Contingent Consideration at Carrying Value) (Details) (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Carrying Value of Contingent Consideration [Roll Forward]      
Fair value of contingent consideration, beginning balance $ 589lts_BusinessCombinationContingentConsiderationEarnoutatFairValue $ 812lts_BusinessCombinationContingentConsiderationEarnoutatFairValue $ 7,111lts_BusinessCombinationContingentConsiderationEarnoutatFairValue
Change in fair value of contingent consideration (12)lts_BusinessCombinationContingentConsiderationIncreaseDecreaseEarnoutatFairValue 121lts_BusinessCombinationContingentConsiderationIncreaseDecreaseEarnoutatFairValue (7,111)lts_BusinessCombinationContingentConsiderationIncreaseDecreaseEarnoutatFairValue
Fair value of contingent consideration 2,759lts_BusinessCombinationContingentConsiderationEarnoutatFairValuefromCurrentPeriodAcquisitions   812lts_BusinessCombinationContingentConsiderationEarnoutatFairValuefromCurrentPeriodAcquisitions
Payments (124)lts_BusinessCombinationPaymentsDuringPeriod (344)lts_BusinessCombinationPaymentsDuringPeriod  
Fair value of contingent consideration, ending balance $ 3,212lts_BusinessCombinationContingentConsiderationEarnoutatFairValue $ 589lts_BusinessCombinationContingentConsiderationEarnoutatFairValue $ 812lts_BusinessCombinationContingentConsiderationEarnoutatFairValue