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Prepaids And Other Current Assets (Schedule Of Prepaids And Other Current Assets) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Prepaids And Other Current Assets [Abstract]    
Prepaid income taxes $ 1,984 $ 5,518
Survey participant incentives and prepaid postage 1,770 2,467
Insurance recovery receivable 993 601
Other 2,394 2,746
Prepaids and other current assets $ 7,141 $ 11,332