Notes Payable (Tables)

12 Months Ended

Dec. 31, 2013

Convertible Notes Payable [Abstract]

Schedule of Convertible Notes

The Notes consisted of the following (in thousands):

	December 31, 2013
Liability:
Principal	$	575,000
Less: debt discount, net of amortization	(160,223		)
Net carrying amount	$	414,777
Equity(1):	$	152,061

Interest Expense Recognized Related to the Notes

	Year ended December 31, 2013
Amortization of debt issuance cost	$	188
Amortization of debt discount	3,310
Total	$	3,498
Effective interest rate of the liability component	6.5		%