Nature Of Operations And Significant Accounting Policies (Schedule Of Changes To Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Balance at beginning of period, net of accumulated amortization	$ 146,227	$ 162,636
Additions	0	5,980
Disposals	(3,789)	0
Amortization expense	16,907	21,646
Currency translation and other	382	(743)
Balance at end of period, net of accumulated amortization	$ 125,913	$ 146,227