Revolving Credit Facility (Narrative) (Details) - Jun. 30, 2015 - USD ($) $ in Millions	Total
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 June 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%