Equity Investment In Unconsolidated Subsidiary (Operating Results) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Equity Investment In Unconsolidated Subsidiary [Abstract]
Net operating revenue	$ 10,911	$ 13,663	$ 21,357	$ 25,199
Net earnings	$ 849	$ 1,147	$ 1,313	$ 1,422