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Labor Union Contracts (Details) (Employees covered under collective bargaining agreements) | 12 Months Ended
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Dec. 31, 2013 Employee
Employees covered under collective bargaining agreements |
Labor Union Contracts |
Approximate percentage of employees who are members of bargaining units (as a percent) | 53.00%
Collective bargaining agreements, term | 4 years
Collective Bargaining Arrangement, Number of Participating Employees | 12,000

X
- Definition Represents the term of the collective bargaining agreements of the entity. + References No definition available. + Details
Name: | ctq_CollectiveBargainingAgreementsTerm
Namespace Prefix: | ctq_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Collective Bargaining Arrangement, Number of Participating Employees + References No definition available. + Details
Name: | ctq_CollectiveBargainingArrangementNumberofParticipatingEmployees
Namespace Prefix: | ctq_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the percentage of employees who are members of various bargaining units represented by the Communications Workers of America and the International Brotherhood of Electrical Workers. + References No definition available. + Details
Name: | ctq_PercentageOfEmployeesWhoAreMembersOfVariousBargainingUnits
Namespace Prefix: | ctq_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration