Business Acquisition Business Acquisition (Allocation of Aggregate Purchase Price) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Current Assets, Receivables	$ 22,206
Business Acquisition, Purchase Price Allocation, Property, Plant and Equipment	2,262
Business Acquisition Purchase Price Allocation Current Noncurrent Assets Prepaid Expense and Other Assets	2,533
Business Acquisition, Purchase Price Allocation, Deferred Taxes Asset (Liability), Net, Noncurrent	2,058
Business Acquisition, Purchase Price Allocation, Goodwill Amount	21,961
Developed Technology Rights [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	2,482
Media Content [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	2,460
Trade Names [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	14,850
Customer Relationships [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	8,050
Advertiser Relationship [Member]
Business Acquisition [Line Items]
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets	$ 11,770