Employee Benefit Plans - Additional Information (Detail)			3 Months Ended		12 Months Ended		3 Months Ended
	Mar. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)	Mar. 31, 2014 Other Non-U.S. Pension Plans [Member] USD ($)	Mar. 31, 2014 U.K. Pension Plans [Member] GBP (£)	Dec. 31, 2011 U.K. Pension Plans [Member] USD ($)	Dec. 31, 2011 U.K. Pension Plans [Member] GBP (£)	Mar. 31, 2014 U.S. Pension Plans [Member] USD ($)	Mar. 31, 2014 Payments From 2014 Through 2020 [Member] GBP (£)	Mar. 31, 2014 Payments From 2012 Through 2020 [Member] GBP (£)
Defined Benefit Plan Disclosure [Line Items]
Company contribution to pension plans			$ 4,800,000	£ 0	$ 3,687,000	£ 2,300,000	$ 0
Additional contribution to plan assets or escrow account								1,000,000	1,000,000
Amended amount from previous escrow arrangement						10,200,000
Aggregate amount in account security arrangement	$ 17,000,000	$ 16,900,000