Stockholders' Equity (Summary Of Common Stock Information) (Details)	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012
Stockholders' Equity [Abstract]
Common stock authorized	30,000,000	30,000,000	30,000,000
Common stock issued	25,594,000	25,376,000	24,957,000
Treasury stock	2,684,000	2,684,000	2,684,000