Share Repurchase (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2013	Dec. 31, 2012	Sep. 30, 2013	Sep. 30, 2013
Disclosure of Repurchase Agreements [Abstract]
Stock repurchase program, Authorized amount		$ 3.0
Repurchase of common stock	$ 1.3		$ 2.0	$ 2.0
Repurchase of common stock, shares	217,000		331,000	334,000