Employee Savings Plan (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Employee Savings Plan
Company contribution as a percentage of each employee's combined salary and certain other compensation for the plan year under the 401(k) Plan	3.00%
Amount of company contribution for the 401(k) Plan	$ 0.7	$ 0.8	$ 1.0