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Income Taxes (Schedule Of Unrecognized Uncertain Tax Positions) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Income Taxes [Abstract]      
Balance at beginning of period $ 1,025 $ 1,065 $ 996
Increase (decrease) due to tax positions taken in, Current period 432 185 184
Increase (decrease) due to tax positions taken in, Prior period (21) 10 493
Increase (decrease) due to settlements with taxing authorities (398)   (375)
Reductions due to lapse of statute of limitations (128) (235) (233)
Balance at end of period $ 910 $ 1,025 $ 1,065