Schedule II - Valuation and Qualifying Accounts and Reserves (Detail) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2010
Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for doubtful accounts	$ 2,100,000	$ 2,100,000	$ 2,100,000
Increase (Decrease) in deferred tax assets	(81,000,000)	(30,000,000)	129,000,000
Deferred tax assets, foreign net operating loss carryforwards	(81,000,000)	(30,000,000)	74,000,000
Increase (Decrease) in Deferred Income Taxes			129,000,000
Increase (Decrease) in Intangible Assets, Current			55,000,000
Allowance for doubtful accounts [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	10,493,000	9,293,000		5,831,000
Additions (deductions) charged to costs and expenses	222,000	1,984,000	3,639,000
Accounts written off	(554,000)	(1,059,000)	(824,000)
Translation adjustments	(1,014,000)	275,000	647,000
Balance at end of period	9,147,000	10,493,000	9,293,000	5,831,000
Valuation allowance on credit and operating loss carryforwards and other net deferred tax assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	503,990,000	450,733,000		290,879,000
Additions (deductions) charged to costs and expenses	(92,204,000)	38,360,000	153,718,000
Accounts written off	0	0	0
Translation adjustments	(56,218,000)	14,897,000	6,136,000
Balance at end of period	$ 355,568,000	$ 503,990,000	$ 450,733,000	$ 290,879,000