Stock-Based Compensation Arrangements (Schedule Of General And Administrative Expenses) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Stock-Based Compensation Arrangements [Abstract]
G & A Expenses	$ 720	$ 1,347	$ 2,438	$ 3,605
Capitalized G & A	744	411	2,234	1,267
Total non-cash stock-based compensation	$ 1,464	$ 1,758	$ 4,672	$ 4,872