Commitments and Contingencies (Details 2) (USD $)	9 Months Ended
	Sep. 30, 2014
Loss Contingencies [Line Items]
D&O insurance coverage limit	$ 200,000,000
Pacchia case | Pending litigation | Plaintiff's expert's reports | Damages to the Company | Minimum
Loss Contingencies [Line Items]
Alleged damages, value	540,000,000
Pacchia case | Pending litigation | Plaintiff's expert's reports | Damages to Class | Minimum
Loss Contingencies [Line Items]
Alleged damages, value	640,000,000
Pacchia case | Pending litigation | Plaintiff's expert's reports | Disgorgement claims | Minimum
Loss Contingencies [Line Items]
Alleged damages, value	1,000,000,000
Pacchia case | Pending litigation | Defendants' experts' reports | Damages to the Company
Loss Contingencies [Line Items]
Alleged damages, value	0
Pacchia case | Pending litigation | Defendants' experts' reports | Damages to Class
Loss Contingencies [Line Items]
Alleged damages, value	$ 0