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Commitments And Contingencies (Schedule Of Future Minimum Rental Payments For Operating Leases) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011
Commitments And Contingencies [Abstract]
2012	$ 2,031
2013	2,228
2014	2,251
2015	2,261
2016	2,294
Thereafter	1,711
Future minimum annual rental commitments	$ 12,776

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The total of future contractually required payments on leases defined as operating.

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For leases having an initial or remaining non-cancelable letter-terms in excess of one year, required rental payments due within one year of the balance sheet date relating to leases defined as operating.

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