Financial Assets and Liabilities that are Recorded at Fair Value and Classified Based on the Lowest Level of Input (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Assets	$ 92,221	$ 450,002
Liabilities	363,090	182,610
Money Market Funds
Assets	10,516	380,593
Interest Rate Swap
Assets	5,699
Liabilities	1,631	5,744
Commodity Forward Purchase Contracts
Assets	15	88
Liabilities	259
Cross Currency Interest Rate Swaps
Assets	19,838
Liabilities	199,454	169,105
Foreign Exchange Forward
Assets	8,303	3,297
Liabilities	3,898	1,874
Long-term Debt
Liabilities	154,512
Corporate Bond Securities
Assets	47,850	66,024
DIO Equity Option Contracts
Liabilities	419
Contingent Considerations On Acquisitions
Liabilities	2,917	5,887
Fair Value, Inputs, Level 1
Assets	10,516	380,593
Fair Value, Inputs, Level 1 | Money Market Funds
Assets	10,516	380,593
Fair Value, Inputs, Level 2
Assets	33,855	3,385
Liabilities	359,754	176,723
Fair Value, Inputs, Level 2 | Interest Rate Swap
Assets	5,699
Liabilities	1,631	5,744
Fair Value, Inputs, Level 2 | Commodity Forward Purchase Contracts
Assets	15	88
Liabilities	259
Fair Value, Inputs, Level 2 | Cross Currency Interest Rate Swaps
Assets	19,838
Liabilities	199,454	169,105
Fair Value, Inputs, Level 2 | Foreign Exchange Forward
Assets	8,303	3,297
Liabilities	3,898	1,874
Fair Value, Inputs, Level 2 | Long-term Debt
Liabilities	154,512
Fair Value, Inputs, Level 3
Assets	47,850	66,024
Liabilities	3,336	5,887
Fair Value, Inputs, Level 3 | Corporate Bond Securities
Assets	47,850	66,024
Fair Value, Inputs, Level 3 | DIO Equity Option Contracts
Liabilities	419
Fair Value, Inputs, Level 3 | Contingent Considerations On Acquisitions
Liabilities	$ 2,917	$ 5,887