Pension and Other Postretirement Benefits - Additional Information (Detail)	12 Months Ended				12 Months Ended		12 Months Ended			12 Months Ended					12 Months Ended		12 Months Ended
	Dec. 31, 2013 USD ($) Employees	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Minimum [Member] Multi-Employer Plan [Member] Location	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Other Postretirement Benefits [Member] USD ($) Customer	Dec. 31, 2012 Other Postretirement Benefits [Member] USD ($)	Dec. 31, 2011 Other Postretirement Benefits [Member] USD ($)	Dec. 31, 2013 Foreign Pension Benefits [Member] USD ($)	Dec. 31, 2012 Foreign Pension Benefits [Member] USD ($)	Dec. 31, 2011 Foreign Pension Benefits [Member] USD ($)	Dec. 31, 2013 Foreign Pension Benefits [Member] GBP (£)	Dec. 31, 2012 Foreign Pension Benefits [Member] GBP (£)	Dec. 31, 2013 Nonqualified Defined Benefit Pension Plan [Member] USD ($)	Dec. 31, 2012 Nonqualified Defined Benefit Pension Plan [Member] USD ($)	Dec. 31, 2013 U.S. Pension Benefits [Member] USD ($)	Dec. 31, 2012 U.S. Pension Benefits [Member] USD ($)	Dec. 31, 2011 U.S. Pension Benefits [Member] USD ($)
Defined Benefit Plan Disclosure [Line Items]
Minimum contributions required																	$ 0
Voluntary contributions made	5,000,000		7,000,000				597,000	642,000		1,764,000	1,786,000	1,693,000					5,008,000	36,000
Minimum contributions expected in 2014															0
Estimated benefit payments, in 2014							783,000			1,193,000					52,000		8,746,000
Estimated benefit payments, in 2015							809,000			1,565,000					72,000		9,220,000
Estimated benefit payments, in 2016							817,000			1,475,000					90,000		9,666,000
Estimated benefit payments, in 2017							824,000			2,178,000					112,000		10,125,000
Estimated benefit payments, in 2018							854,000			1,593,000					330,000		10,603,000
Estimated benefit payments, in 2019-2023							5,251,000			13,598,000					1,729,000		59,563,000
Fair value of plan assets							0	0	0	48,536,000	41,875,000	36,436,000	29,315,000	25,774,000			164,085,000	140,218,000	133,403,000
Accumulated benefit obligations										60,830,000	59,210,000		36,740,000	36,443,000	2,794,000	2,082,000	167,723,000	180,737,000
Employer contribution expected in 2014										1,859,000
Contributions to defined contribution pension plan										316,000	311,000	415,000
Contributions to the defined contribution pension plan expected in 2014										403,000
Defined benefit plan contribution made to trusts															0
Fair market value included in other noncurrent assets															4,092,000	3,358,000
Number of employer locations contributed to the plan					1,750
Number of employees participate in the plan	250,000
Multiemployer plan number of employees description	In excess of 250,000
Total amount of assets collected	9,300,000,000
Percentage of funded status in excess	100.00%
Participation of corporation's employees in the plan	Less than 100
Corporation's contributions	230,000	241,000	246,000
Percentage of employers contributions	5.00%
Contributions expected in 2014	261,000
Number of subsidiary having postretirement health care benefits							1
Service period to avail existing pension plan	15 years
Maximum maturity period of fixed income investments	10 years
Investments in diversified portfolio	Invests at least 65% of its assets in a diversified portfolio of fixed income securities of varying maturities.
Percentage of assets to invest in a diversified portfolio of fixed income securities of varying maturities	65.00%
Target allocation	Generate a minimum annual inflation adjusted return of 5% and outperform a traditional 70/30 equities/bond portfolio.
Defined benefit plan actuarial gain loss percentage				10.00%		10.00%
High-quality fixed-income investments maturity	10 years
Assumed health care cost trend rate for 2014	6.50%
Percentage decrease in other postretirement benefits in 2019							4.75%
Year related to decrease in health care cost trend rate							2018
Percentage point increase or decrease in the assumed health care cost trend rate							1.00%
One percent effect on postretirement benefit obligation							2,800,000
One percent effect on annual benefit expense							$ 350,000