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Commitments and Contingencies (Detail 3) (2015 Profit Sharing Plan)
3 Months Ended
Mar. 31, 2015
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits  
Percentage of profit sharing plan award deferred into Deferred Compensation Plan 50.00%twoc_DeferredCompensationArrangementWithIndividualPercentageOfProfitSharingDeferredIntoCompensationPlan
KME's  
Deferred Compensation Arrangement with Individual, Excluding Share-based Payments and Postretirement Benefits  
Minimum period of service from the first deferral required for receipt of obligations 3 years