Subsequent Events (Details) (Subsequent Event [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012
Subsequent Event [Member]
Subsequent Event (Textual) [Abstract]
Credit agreement period	3 years
Revolving loans and letters of credit	$ 50.0
Federal funds effective rate	0.50%
LIBOR rate description	the federal funds effective rate plus 0.50% and (c) one month adjusted LIBOR plus 1.00% plus (ii) 0.50% or (B) the sum of (i) adjusted LIBOR plus
Adjusted LIBOR rate	1.50%
Revolving loan commitment rate	0.30%
Interest per annum	2.00%
Total leverage ratio	0.025
Equity interest	65.00%
Interest coverage ratio	0.035
One month adjusted LIBOR	1.00%
LIBOR Rate	0.50%
Interest due on loan	$ 10