Notes Payable (Bank Of America Line Of Credit) (Narrative) (Details) (US Bank Of America Line Of Credit [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Oct. 31, 2012
US Bank Of America Line Of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, previous borrowing capacity		$ 3.0
Line of credit facility, maximum borrowing capacity	5.0
Spread on variable interest rate	3.50%
Unused line fee	0.03%
Undrawn balance	$ 3.0