Share-Based Compensation and Equity - Unrecognized Compensation Costs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Cost	$ 24,087
Stock Options [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Cost	3,460
Weighted-Average Period	1 year 3 months 18 days
Restricted Stock Units [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Cost	9,099
Weighted-Average Period	1 year 9 months 19 days
Performance Shares [Member]
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Unrecognized Cost	$ 11,528
Weighted-Average Period	1 year 8 months 12 days