Borrowings (Tables)

9 Months Ended

Sep. 30, 2014

Debt Disclosure [Abstract]

Schedule of Future Minimum Payments under the Loans Payable

Future minimum payments under indebtedness agreements outstanding as of September 30, 2014 are as follows:

(in thousands) As of September 30, 2014:	4.50% Convertible Senior Notes			Loan Agreement
Remainder of 2014	$	—		$	4,548
2015		5,625			18,135
2016		5,625			23,804
2017		5,625			—
2018 and thereafter		141,875			—
		158,750			46,487
Less interest		(33,750	)		(5,287	)
Less unamortized discount		(46,409	)		(1,748	)
Less current portion		—			(14,615	)
Loans payable, net of current portion	$	78,591		$	24,837