Share-Based Compensation and Benefit Plans (Employee Stock Purchase Plan) (Narrative) (Details) (Employee Stock Purchase Plan [Member])	12 Months Ended
	Dec. 31, 2014 Rate
Employee Stock Purchase Plan [Member]
Employee stock purchase plan stock purchase percentage	85.00%
Other employee benefit plan descriptions	The Company's employee stock purchase plan (the "ESPP") permits eligible employees to purchase shares of the Company's common stock at 85% of the fair market value. Employees may authorize the Company to withhold up to 5% of their annual salary to participate in the plan.