Revolving Credit Facility (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended	9 Months Ended
	Jun. 30, 2015	Sep. 30, 2015
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 15.0
Line of credit facility, amount outstanding		$ 0.0
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%
Debt instrument, covenant compliance		As of September 30, 2015, we were in compliance with all of our covenants
Revolving Credit Facility [Member] | London Interbank Offered Rate (LIBOR) [Member]
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	2.50%
Letter of Credit [Member]
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 5.0
Line of credit facility, commitment fee percentage		1.00%