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Fair Value Measurements (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
12 Months Ended 0 Months Ended 12 Months Ended
Dec. 31, 2014
Jun. 14, 2013
Aug. 24, 2012
May 16, 2012
Dec. 31, 2013
Dec. 31, 1991
Dec. 31, 1990
Dec. 31, 2012
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Percentage of stock redeemed (in hundredths)   54.50%tlsrp_PercentageOfStockRedeemed            
Preferred stock dividend rate per annum (in hundredths) 12.00%us-gaap_PreferredStockDividendRatePercentage              
Senior Redeemable Preferred Stock [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Redemption price of senior preferred stock   $ 2.0us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
$ 2.0us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
$ 2.0us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecurities
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
       
Percentage of stock redeemed (in hundredths)     36.00%tlsrp_PercentageOfStockRedeemed
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
26.70%tlsrp_PercentageOfStockRedeemed
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
       
Carrying amount of senior redeemable preferred stock 2.0us-gaap_RedeemableNoncontrollingInterestEquityOtherFairValue
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
            1.9us-gaap_RedeemableNoncontrollingInterestEquityOtherFairValue
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
Preferred stock dividend rate per annum (in hundredths) 14.125%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_PreferredUnitsByNameAxis
= us-gaap_RedeemablePreferredStockMember
             
Public Preferred Stock [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Preferred stock dividend rate per annum (in hundredths) 12.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
      12.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
6.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
6.00%us-gaap_PreferredStockDividendRatePercentage
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
 
Public preferred stock par value (in dollar per share) 0.01us-gaap_TemporaryEquityParOrStatedValuePerShare
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
             
Carrying value of public preferred stock 120.1us-gaap_PreferredStockValueOutstanding
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
      116.3us-gaap_PreferredStockValueOutstanding
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
     
Estimate of Fair Value, Fair Value Disclosure [Member] | Public Preferred Stock [Member]                
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]                
Public preferred stock         $ 43.0us-gaap_RedeemableNoncontrollingInterestEquityFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember
    $ 48.9us-gaap_RedeemableNoncontrollingInterestEquityFairValue
/ us-gaap_FairValueByMeasurementBasisAxis
= us-gaap_EstimateOfFairValueFairValueDisclosureMember
/ us-gaap_PreferredUnitsByNameAxis
= tlsrp_TwelvePercentCumulativeExchangeableRedeemablePreferredStockMember