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Share-Based Compensation (Schedule Of Share-Based Compensation Information) (Details) (USD $)
3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Share-Based Compensation [Abstract]    
Expense relating to share grants $ 834,000 $ 891,000 [1]
Adjustments to reflect changes in market price of Company's common stock   30,000 [1]
Amounts capitalized (113,000) (97,000) [1]
Total charged to operations $ 721,000 $ 824,000 [1]
[1] Includes expense relating to grants previously recorded as equity and liability awards.