EARNINGS PER SHARE AND STOCKHOLDERS' EQUITY: (Details 3) (Go Digital Tecnologia E Participacoes [Member])	Mar. 31, 2011
Go Digital Tecnologia E Participacoes [Member]
Noncontrolling Interest
Percentage of interest acquired	70.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant