Acquisitions (Schedule Of Purchase Price Allocation) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2012
Business Acquisition [Line Items]
Cash and cash equivalents	$ 5,128
Accounts receivable	3,827
Prepaid expenses and other current assets	239
Property & equipment	129
Other long-term assets	202
Other intangibles	2,100
Goodwill	25,308
Accounts payable	778
Accrued compensation and benefits	1,009
Accrued other liabilities	473
Notes payable	74
Commissions payable	134
Long-term tax liability	222
Deferred tax liability	3,295
Deferred revenue	4,319
Business Acquisition, Cost of Acquired Entity, Purchase Price	46,229
Amortization period of intangible assets	1 year
Customer Relationships [Member]
Business Acquisition [Line Items]
Other intangibles	8,300
Amortization period of intangible assets	15 years
Acquired Development [Member]
Business Acquisition [Line Items]
Other intangibles	$ 11,300
Amortization period of intangible assets	10 years