Stockholders' Equity (Deficit) - Summary of Accumulated Other Comprehensive Losses (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Unrealized gains on investments, net of tax	$ 52	$ 269
Unrealized foreign currency losses	(1,105)	(975)
Pension and postretirement unfunded liability adjustment, net of tax	(75,800)	(77,581)
Accumulated other comprehensive losses	$ (76,853)	$ (78,287)