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Share-Based Compensation (Schedule Of Share-Based Compensation Information) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Share-Based Compensation [Abstract]        
Expense relating to share grants $ 1,242,000 $ 1,149,000 $ 3,018,000 $ 2,885,000
Adjustments to reflect changes in market price of Company's common stock       10,000
Amounts capitalized (98,000) (89,000) (326,000) (281,000)
Total charged to operations $ 1,144,000 $ 1,060,000 $ 2,692,000 $ 2,614,000