Summary of Segment Net Revenues, Segment Operating Income (Loss) and Reconciliation of Segment Income to Consolidated Income from Continuing Operations Before Income Taxes (Parenthetical) (Detail) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Segment Reporting Information [Line Items]
Corporate administrative support costs, Adjustment to reduce tax	[1]	$ 18,965	$ 13,012	$ 53,699
Tax Adjustments
Segment Reporting Information [Line Items]
Corporate administrative support costs, Adjustment to reduce tax				$ 7,721

[1] Corporate administrative support costs in 2013 also include $7,721 of an adjustment to reduce a tax asset associated with the HCP acquisition escrow provisions.