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, 2014	Dec. 31, 2013
Accounting Policies [Abstract]
Balance at beginning of period, net of accumulated amortization	$ 408,923	$ 125,913
Additions	0
Finite-lived Intangible Assets Acquired		301,800
Disposals	0	(311)
Amortization expense	37,882	18,795
Finite-Lived Intangible Assets, Translation Adjustments	(17,587)	316
Balance at end of period, net of accumulated amortization	$ 353,454	$ 408,923