Employee Benefits - Fair Value Hierarchy of Plan Assets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 405,289	$ 372,142	$ 347,084
U.S. Pension Plans [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,976	6,125
U.S. Pension Plans [Member] | Receivables [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	639	2,285
U.S. Pension Plans [Member] | Level 2 [Member] | Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,976	6,125
U.S. Pension Plans [Member] | U.S. Common Stock [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43,338	40,045
U.S. Pension Plans [Member] | U.S. Common Stock [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	43,338	40,045
U.S. Pension Plans [Member] | Non-U.S. Common Stock [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	700
U.S. Pension Plans [Member] | Non-U.S. Common Stock [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	700
U.S. Pension Plans [Member] | Balanced Funds [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,077	7,631
U.S. Pension Plans [Member] | Balanced Funds [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,077	7,631
U.S. Pension Plans [Member] | Pooled Funds [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	150,372	136,634
U.S. Pension Plans [Member] | Pooled Funds [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	150,372	136,634
U.S. Pension Plans [Member] | Government & Government Agency Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,662	76,095
U.S. Pension Plans [Member] | Government & Government Agency Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	6,662	76,095
U.S. Pension Plans [Member] | Mutual Fund [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	123,447
U.S. Pension Plans [Member] | Mutual Fund [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	123,447
U.S. Pension Plans [Member] | Corporate Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61,382	93,062
U.S. Pension Plans [Member] | Corporate Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	61,382	93,062
U.S. Pension Plans [Member] | Municipal Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,696	8,283
U.S. Pension Plans [Member] | Municipal Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	8,696	8,283
U.S. Pension Plans [Member] | Asset Backed Securities [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,982
U.S. Pension Plans [Member] | Asset Backed Securities [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		1,982
U.S. Pension Plans [Member] | Fair Value Of Plan Assets Before Receivables [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	404,650	369,857
U.S. Pension Plans [Member] | Fair Value Of Plan Assets Before Receivables [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	44,038	40,045
U.S. Pension Plans [Member] | Fair Value Of Plan Assets Before Receivables [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	360,612	329,812
Non-U.S. Pension Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	776,188	702,366	671,559
Non-U.S. Pension Plans [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,075	8,479
Non-U.S. Pension Plans [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	383,404	412,481
Non-U.S. Pension Plans [Member] | Level 1 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,075	8,479
Non-U.S. Pension Plans [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	377,089	234,323
Non-U.S. Pension Plans [Member] | Level 2 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	15,695	55,562
Non-U.S. Pension Plans [Member] | Level 3 [Member] | Cash [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Level 3 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,252	1,525
Non-U.S. Pension Plans [Member] | U.S. Large Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,009	26,683
Non-U.S. Pension Plans [Member] | U.S. Large Cap [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	28,009	26,683
Non-U.S. Pension Plans [Member] | U.S. Large Cap [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | U.S. Large Cap [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Large Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116,473	107,964
Non-U.S. Pension Plans [Member] | Non-U.S. Large Cap [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	116,473	107,964
Non-U.S. Pension Plans [Member] | Non-U.S. Large Cap [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Large Cap [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mid Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	132	3,116
Non-U.S. Pension Plans [Member] | Non-U.S. Mid Cap [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	132	3,116
Non-U.S. Pension Plans [Member] | Non-U.S. Mid Cap [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mid Cap [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Small Cap [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	35	455
Non-U.S. Pension Plans [Member] | Non-U.S. Small Cap [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	35	455
Non-U.S. Pension Plans [Member] | Non-U.S. Small Cap [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Small Cap [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Emerging Markets [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,876	14,265
Non-U.S. Pension Plans [Member] | Emerging Markets [Member] | Level 1 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	25,876	14,265
Non-U.S. Pension Plans [Member] | Emerging Markets [Member] | Level 2 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Emerging Markets [Member] | Level 3 [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | U.S. Treasuries/Government Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52	74
Non-U.S. Pension Plans [Member] | U.S. Treasuries/Government Bonds [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	52	74
Non-U.S. Pension Plans [Member] | U.S. Treasuries/Government Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | U.S. Treasuries/Government Bonds [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | U.S. Corporate Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		5
Non-U.S. Pension Plans [Member] | U.S. Corporate Bonds [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		5
Non-U.S. Pension Plans [Member] | U.S. Corporate Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | U.S. Corporate Bonds [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Treasuries/Government Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	200,217	234,574
Non-U.S. Pension Plans [Member] | Non-U.S. Treasuries/Government Bonds [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	131,764	199,266
Non-U.S. Pension Plans [Member] | Non-U.S. Treasuries/Government Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	68,453	35,308
Non-U.S. Pension Plans [Member] | Non-U.S. Treasuries/Government Bonds [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Corporate Bonds [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	246,651	161,187
Non-U.S. Pension Plans [Member] | Non-U.S. Corporate Bonds [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	64,583	52,174
Non-U.S. Pension Plans [Member] | Non-U.S. Corporate Bonds [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	182,068	109,013
Non-U.S. Pension Plans [Member] | Non-U.S. Corporate Bonds [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mortgage-Backed Securities [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mortgage-Backed Securities [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mortgage-Backed Securities [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Mortgage-Backed Securities [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Asset-Backed Securities [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,734
Non-U.S. Pension Plans [Member] | Non-U.S. Asset-Backed Securities [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Asset-Backed Securities [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		11,734
Non-U.S. Pension Plans [Member] | Non-U.S. Asset-Backed Securities [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Other Fixed Income [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	11,404	8,664
Non-U.S. Pension Plans [Member] | Non-U.S. Other Fixed Income [Member] | Level 1 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	1,460
Non-U.S. Pension Plans [Member] | Non-U.S. Other Fixed Income [Member] | Level 2 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	9,944	8,664
Non-U.S. Pension Plans [Member] | Non-U.S. Other Fixed Income [Member] | Level 3 [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Insurance Contracts [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	945	320
Non-U.S. Pension Plans [Member] | Insurance Contracts [Member] | Level 1 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	945
Non-U.S. Pension Plans [Member] | Insurance Contracts [Member] | Level 2 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets		320
Non-U.S. Pension Plans [Member] | Insurance Contracts [Member] | Level 3 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Hedge Funds [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,436	54,036
Non-U.S. Pension Plans [Member] | Hedge Funds [Member] | Level 1 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Hedge Funds [Member] | Level 2 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Hedge Funds [Member] | Level 3 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	14,436	54,036
Non-U.S. Pension Plans [Member] | Private Equity [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7	1
Non-U.S. Pension Plans [Member] | Private Equity [Member] | Level 1 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Private Equity [Member] | Level 2 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Private Equity [Member] | Level 3 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	7	1
Non-U.S. Pension Plans [Member] | Absolute Return Funds [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51,156
Non-U.S. Pension Plans [Member] | Absolute Return Funds [Member] | Level 2 [Member] | Alternative Type of Investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	51,156
Non-U.S. Pension Plans [Member] | Non-U.S. Real Estate [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	66,720	70,809
Non-U.S. Pension Plans [Member] | Non-U.S. Real Estate [Member] | Level 1 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets
Non-U.S. Pension Plans [Member] | Non-U.S. Real Estate [Member] | Level 2 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	65,468	69,284
Non-U.S. Pension Plans [Member] | Non-U.S. Real Estate [Member] | Level 3 [Member] | Real Estate [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 1,252	$ 1,525