Other Assets (Detail) - Other Assets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012		Dec. 31, 2011
Security deposits	$ 7,740		$ 6,581
Debt issuance costs	2,768		3,866
Benefit plan-related assets	37,016		38,403
Non-current deferred tax assets	22,527		22,795
Tenant improvement allowance (1)		[1]	16,062	[1]
Other	3,344		2,638
Total other assets	$ 73,395		$ 90,345

[1] The balance as of December 31, 2011 represented the landlord receivable related to the renovation of the Company's Stamford headquarters facility, the majority of which was collected during 2012, with the balance reclassified to current assets. See Note 1 - Business and Significant Accounting Policies for additional information.