Income Taxes (Detail) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Net, Current	$ 32,600,000	$ 31,400,000
Deferred Tax Liabilities, Net, Current	1,300,000	600,000
Deferred Tax Assets, Net, Noncurrent	22,527,000	22,795,000
Deferred Tax Liabilities, Net, Noncurrent	0.1	0
Valuation Allowance, Amount	1,900,000	1,900,000
Unrecognized Tax Benefits	17,552,000	18,345,000	15,824,000
Unrecognized Tax Benefits Reductions Resulting From Settlements With Taxing Authorities And Lapse Of Applicable Statute Of Limitations	4,500,000
Liability For Uncertain Tax Positions	13,100,000	15,400,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	4,600,000	4,800,000
Income Tax Examination, Penalties and Interest Expense	400,000	1,500,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	12,600,000
Earnings of Certain Non US Subsidiaries Indefinitely Reinvested	85,000,000
Deferred Tax Liabilities, Undistributed Foreign Earnings	17,000,000
Expire Within One to Five Years [Member] | State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Period	1 year
Expire Within One to Five Years [Member] | State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Period	5 years
Expire Within One to Five Years [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards	3,300,000
Expire Within Six to Fifteen Years [Member] | State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Period	6 years
Expire Within Six to Fifteen Years [Member] | State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Period	15 years
Expire Within Six to Fifteen Years [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards	99,700,000
Expire Within Sixteen to Twenty Years [Member] | State and Local Jurisdiction [Member] | Minimum [Member]
Operating Loss Carryforwards Expiration Period	16 years
Expire Within Sixteen to Twenty Years [Member] | State and Local Jurisdiction [Member] | Maximum [Member]
Operating Loss Carryforwards Expiration Period	20 years
Expire Within Sixteen to Twenty Years [Member] | State and Local Jurisdiction [Member]
Operating Loss Carryforwards	5,800,000
Expire Over Next Twenty Years [Member] | Non US [Member]
Operating Loss Carryforwards	2,100,000
Carried Forward Indefinitely [Member] | Non US [Member]
Operating Loss Carryforwards	28,500,000
State and Local Jurisdiction [Member]
Operating Loss Carryforwards	108,800,000
Non US [Member]
Operating Loss Carryforwards	30,600,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	6,700,000
Stamford [Member]
Unrecognized Tax Benefits	$ 2,600,000