COMMITMENTS AND CONTINGENCIES: (Details Textual) (USD $) In Millions, unless otherwise specified	12 Months Ended		3 Months Ended
Dec. 31, 2010	Dec. 31, 2009	Mar. 31, 2013 Standby Letters Of Credit [Member]	Mar. 31, 2013 Music License Agreements [Member]	Mar. 31, 2012 Music License Agreements [Member]
Percentage Of Provisional Discount On Music Licensing Fee	11.00%	7.00%
License Costs Continuing Operations				$ 2.4	$ 2.8
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Liability			$ 1.0

The face amount of financial liabilities, which are not recognized in the financial statements (off-balance sheet) because they fail to meet some other criterion for recognition.

No definition available.

Name:	us-gaap_FairValueDisclosureOffbalanceSheetRisksFaceAmountLiability
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant