Stock-Based Compensation Parenthetical (Details) (USD $)	12 Months Ended
	Dec. 31, 2013 Under $50.00	Dec. 31, 2013 $50.01 to $80.00	Dec. 31, 2013 $80.01 to $120.00	Dec. 31, 2013 $120.01 to $160.00	Dec. 31, 2013 $160.01 to $220.00	Dec. 31, 2013 $220.01 to $279.00	Dec. 31, 2013 Restricted Stock Units (RSUs)	Dec. 31, 2012 Restricted Stock Units (RSUs)	Dec. 31, 2011 Restricted Stock Units (RSUs)
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]
Unrecognized Share Based Compensation							$ 0	$ 0	$ 0
Authorized Shares Under Plan, Lower Limit		$ 50.01	$ 80.01	$ 120.01	$ 160.01	$ 220.01
Authorized Shares Under Plan, Upper Limit	$ 50.00	$ 80.00	$ 120.00	$ 160.00	$ 220.00	$ 279.00