Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Commitments And Contingencies [Abstract]
Balance at beginning of period	$ 11,519	$ 14,561
Acquisitions		67
Payments	(2,813)	(1,550)
Accretion	686	920
Fair value adjustments	343	(122)
Balance at end of period	9,735	13,876
Less current portion in accrued expenses and other current liabilities	(4,806)	(4,668)
Total long-term portion in other long-term liabilities	$ 4,929	$ 9,208