Share-Based Compensation and Equity Share-Based Compensation and Equity - Non-Employee Share-based Compensation (Details) (Non-employee Plan [Member], USD $) In Thousands, except Per Share data, unless otherwise specified	1 Months Ended
	Dec. 31, 2005
Non-employee Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	35
Warrants, Exercise Price	$ 46.00
Share-based Compensation, Warrants Issued Grant Date Fair Value	$ 14.66
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate	4.45%
Expected dividend yield	1.63%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate	30.00%
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Term	6 years