Real Estate Charges

12 Months Ended

Dec. 31, 2017

Restructuring and Related Activities [Abstract]

Since 2010, in connection with our workforce reductions and in an effort to reduce our global real estate footprint, we have implemented a global office space consolidation. As a result, we have sub-leased over one million square feet of office space. The activity in the liability account relating to our global space consolidation initiatives for the following periods is:



	Year Ended December 31,
	2017			2016
	(in thousands)
Balance as of January 1,	$	112,932		$	123,912
Expense incurred	28,507			12,248
Deferred rent	7,083			4,930
Payments made	(39,122		)	(32,988		)
Interest accretion	4,235			4,830
Balance as of end of period	$	113,635		$	112,932