Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Commitments And Contingencies [Abstract]
Balance at beginning of period	$ 11,519	$ 14,561
Acquisitions		67
Payments	(4,287)	(3,253)
Accretion	1,041	1,324
Fair value adjustments	209	(63)
Balance at end of period	8,482	12,636
Less current portion in accrued expenses and other current liabilities	(4,608)	(5,667)
Total long-term portion in other long-term liabilities	$ 3,874	$ 6,969