Selling Arrangement (Narrative) (Details) (News America Settlement Agreement [Member], USD $)	1 Months Ended	3 Months Ended	6 Months Ended
	Feb. 28, 2011	Jun. 30, 2012	Jun. 30, 2012	Jun. 30, 2011
News America Settlement Agreement [Member]
Gain Contingencies [Line Items]
Settlement agreement, amount received	$ 125,000,000			$ 125,000,000
Settlement agreement, amount paid	4,000,000
Settlement agreement, term	10 years
Settlement agreement, amortization expense		100,000	200,000
Settlement agreement, expected yearly amortization expense, year one		400,000	400,000
Settlement agreement, expected yearly amortization expense, year two		400,000	400,000
Settlement agreement, expected yearly amortization expense, year three		400,000	400,000
Settlement agreement, expected yearly amortization expense, year four		400,000	400,000
Settlement agreement, expected yearly amortization expense, year five		$ 400,000	$ 400,000
Settlement agreement, expected yearly amortization expense, term			5 years