Fair Value Measurements (Financial Assets and Liabilities Carried at Fair Value) (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets - Marketable securities		$ 2,798
Liabilities - Contingent consideration liability	0	0
Fair Value, Inputs, Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets - Marketable securities		0
Liabilities - Contingent consideration liability	0	0
Fair Value, Inputs, Level 3 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets - Marketable securities		0
Liabilities - Contingent consideration liability	6,904	1,290
Estimate of Fair Value, Fair Value Disclosure [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Assets - Marketable securities		2,798
Liabilities - Contingent consideration liability	$ 6,904	$ 1,290