Labor Union Contracts (Details)	6 Months Ended
Jun. 30, 2012
Minimum
Labor Union Contracts
Percentage of employees who are members of bargaining units	54.00%
Employees covered under collective bargaining agreements \| Work force concentration
Labor Union Contracts
Collective bargaining agreements, term (in years)	4

Represents the percentage of employees who are members of bargaining units represented by the Communications Workers of America and the International Brotherhood of Electrical Workers.

No definition available.

Name:	ctq_PercentageOfEmployeesWhoAreMembersOfVariousBargainingUnits
Namespace Prefix:	ctq_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration