Accrued Expenses

12 Months Ended

Dec. 31, 2013

Payables and Accruals [Abstract]

Accrued Expenses

13. Accrued Expenses

Accrued expenses consist of the following:

	December 31,
	2013		2012
	(In thousands)
Payroll and benefits	$	75,909	$	56,651
Deferred revenue and customer advances	44,764		52,773
Accrued royalties (Note 19)	43,324		33,324
Accrued interest	21,807		19,048
Acquisition payable (Note 3)	17,897		—
Income taxes payable	17,528		8,341
Accrued severance plan obligations (Note 15)	11,197		9,516
Other accrued expenses	31,826		33,311
Total accrued expenses	$	264,252	$	212,964

Accrued royalties relate to our estimate of royalties due as a result of our pending patent license litigation (Note 19).