Income Taxes - Additional Information (Detail) (USD $)	12 Months Ended				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2008	Dec. 31, 2012 U K Subsidiaries [Member]	Dec. 31, 2013 Singapore Economic Development Board [Member]	Dec. 31, 2012 Singapore Economic Development Board [Member]	Dec. 31, 2011 Singapore Economic Development Board [Member]	Dec. 31, 2009 Singapore Economic Development Board [Member]	Dec. 31, 2013 Federal [Member]	Dec. 31, 2013 State [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Minimum [Member]
Income Taxes [Line Items]
Deferred income taxes undistributed foreign earnings	$ 354,164,000	$ 256,000,000
Effective tax rate	35.00%								17.00%
Income tax rate									10.00%
Expiration of tax rate if agreed commitments are not met						2014
Extended tax rate expiration date if requirements are met						2018
Reduction in consolidated income taxes						1,860,000	2,002,000	2,030,000
Unrecognized tax benefits related to an acquisition	4,000,000	4,680,000		4,000,000
Increase in tax liability benefits					680,000
Net operating loss carryforwards, federal	8,252,000
Net operating loss carryforwards, state	26,980,000
Net operating loss carryforwards, expire										2022 through 2027	2013 through 2020
Open tax years by major tax jurisdiction												2012	2009
Income tax interest and penalties accrued	$ 0	$ 0	$ 0