Commitments And Contingencies (Reconciliation Of Contingent Consideration Liability) (Details) (USD $)	3 Months Ended		12 Months Ended
	Dec. 31, 2014		Dec. 31, 2014		Dec. 31, 2013		Dec. 31, 2012
Business Combination, Contingent Consideration, Reconciliation of Change in Liability [Roll Forward]
Balance at beginning of period			$ 7,414,000	[1]	$ 11,519,000	[1]	$ 14,561,000
Acquisitions			3,370,000		0		67,000
Payments			(3,739,000)		(5,456,000)		(4,315,000)
Accretion (a)			1,075,000	[2]	1,308,000	[2]	1,756,000	[2]
Fair value adjustments (a)	9,000	[2]	9,000	[2]	43,000	[2]	(550,000)	[2]
Balance at end of the period (b)	8,129,000	[1]	8,129,000	[1]	7,414,000	[1]	11,519,000	[1]
Less current portion in accrued expenses and other current liabilities	(3,622,000)		(3,622,000)		(3,462,000)		(5,429,000)
Total long-term portion in other long-term liabilities	4,507,000		4,507,000		3,952,000		6,090,000
Contingent consideration, total remaining estimated payments	$ 11,700,000

[1] Amounts represent the fair value of estimated remaining payments. The total estimated remaining payments as of December 31, 2014 are $11.7 million. The liability for contingent consideration expires at various dates through September 2029. Certain of the contingent consideration arrangements are subject to a maximum payment amount, while the remaining arrangements have no maximum contingent consideration.

[2] Recorded in selling, general and administrative expense in the Consolidated Statements of Income