Revolving Credit Facility and Notes Payable (Narrative) (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended	12 Months Ended
	Jan. 27, 2006	Dec. 31, 2013	Dec. 31, 2012
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15.0
Debt instrument, description of variable rate basis	prime rate or LIBOR plus 2.5%
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Line of credit facility, amount outstanding		$ 1.5	$ 1.5
Line of credit facility, interest rate during period		2.75%
Letters of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit facility, commitment fee percentage	1.00%
London Interbank Offered Rate (LIBOR) [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%