Subsequent Events (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012
Subsequent Events [Abstract]
Credit agreement, previous maturity date	July 1, 2012
Credit agreement, expiration date	April 23, 2015
Borrowing capacity	$ 20
Maximum potential borrowing capacity	$ 50
Adjusted LIBO Rate basis (in hundredths)	1.25%
Adjusted Base Rate - Daily One-Month LIBO Rate basis (in hundredths)	1.50%