Acquisition, Goodwill, And Other Intangible Assets (Schedule Of Amortizable Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Finite-Lived Intangible Assets [Line Items]
Cost	$ 90,039	$ 90,039
Accumulated Amortization	(20,670)	(9,355)
Net Book Value	69,369	80,684
Customer Related Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	44,355	44,355
Accumulated Amortization	(8,214)	(3,286)
Net Book Value	36,141	41,069
Technology [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	43,446	43,446
Accumulated Amortization	(10,269)	(4,108)
Net Book Value	33,177	39,338
Trade Name [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	248	248
Accumulated Amortization	(248)	(165)
Net Book Value		83
Technology Designs [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	490	490
Accumulated Amortization	(463)	(340)
Net Book Value	27	150
Non-Compete Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	100	100
Accumulated Amortization	(76)	(56)
Net Book Value	24	44
Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Cost	1,400	1,400
Accumulated Amortization	$ (1,400)	$ (1,400)