Stock-Based Compensation Employee Stock Purchase Plan (Details) (Employee Stock [Member], USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Employee Stock [Member]
[Line Items]
Shares of stock sold to employees(1)	94	[1]	101	[1]	99	[1]
Weighted average fair value per ESPP award(2)	$ 6.61	[2]	$ 6.29	[2]	$ 6.22	[2]

[1] Stock sold to employees during each fiscal quarter under the ESPP is associated with the offering period ending on the last day of the previous fiscal quarter.

[2] Relating to awards associated with the offering periods during the years ended December 31. Effective October 1, 2013, the ESPP is no longer compensatory and therefore the 2013 weighted average fair value per award is for the nine months ended September 30, 2013.