Income Taxes - Schedule of Reconciliation of Statutory U.S. Federal Income Tax Rate to Effective Income Tax Rate for Continuing Operations (Detail)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation
Statutory U.S. federal income tax rate	(35.00%)	35.00%	35.00%
State and local income taxes	(3.80%)	2.70%	2.80%
Nondeductible goodwill	15.00%	103.50%
Valuation allowance	2.70%	0.10%	(0.30%)
Foreign taxes	(2.30%)	(15.60%)	(1.30%)
Tax credits		(10.50%)	(2.80%)
Worthless stock		(3.00%)
Other	(2.40%)	(4.70%)	(0.90%)
Effective income tax rate	(25.80%)	107.50%	32.50%