Goodwill (Schedule Of Goodwill) (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 segment	Dec. 31, 2012
Goodwill [Abstract]
Balance at beginning of period	$ 147,258,000	$ 130,747,000
Purchase price adjustments	(1,463,000)	(1,623,000)
Acquisitions		17,987,000
Foreign currency translation impact	725,000	147,000
Balance at end of period	146,520,000	147,258,000
Number of operating segments	1
Reduction of goodwill	$ 1,500,000