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Industry Segments (Details 2) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Corporate Overhead Footnote    
General and administrative expense $ 8,850tti_Corporategeneralandadministrativeexpense $ 11,394tti_Corporategeneralandadministrativeexpense
Depreciation and amortization 253tti_Corporatedepreciationdepletionamortizationandaccretion 554tti_Corporatedepreciationdepletionamortizationandaccretion
Interest expense 4,997tti_Corporateinterestexpense 4,531tti_Corporateinterestexpense
Other general corporate (income) expense, net 463tti_Corporateothernonoperatingincomeexpense 562tti_Corporateothernonoperatingincomeexpense
Total $ 14,563tti_Totalcorporateoverheadperiod $ 17,041tti_Totalcorporateoverheadperiod