Financial Instruments Measured at Fair Value - Derivatives (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	$ (654)		$ (10,939)
Cash Paid for Termination of Net Investment Hedges	7,700
Derivative Instrument Gain (Loss) Reclassified into Income, Net	(245)
Derivative, Notional Amount	445,684		425,053
Fair Value Measurement Contingent Consideration	2,123
Fair Value Measurement Contingent Consideration Non-Current	(3,722)		(806)
6.875% senior notes, due 2013 [Member]
Derivatives, Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	6.875%
3.375% notes, due 2015 [Member]
Derivatives, Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	3.375%
Interest Rate Swaps Converting Senior Notes Due in 2013 [Member]
Derivatives, Fair Value [Line Items]
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge					12,203
Interest Rate Swaps Converting Notes Due in 2015 [Member]
Derivatives, Fair Value [Line Items]
Deferred Gain (Loss) on Discontinuation of Interest Rate Fair Value Hedge			11,856
Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]
Derivatives, Fair Value [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					2.63%
Derivative, Fair Value, Net	(10,832)
Derivative, Notional Amount					175,000
Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	165		(10,444)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(819)		(495)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Income, Net	(144)	[1]	(3,777)	[1]	(3,633)	[1]
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(2,094)		(2,056)
Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	1,275		1,561
Fair Value Hedging [Member] | Interest Rate Swaps Converting Notes Due in 2015 [Member]
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	250,000
Fair Value Hedging [Member] | Interst Rate Swaps Converting Senior Notes Due in 2013 [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	275,000
Cash Flow Hedging [Member] | Interest Rate Swap [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	0		(10,832)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net	3,132	[2]	(7,823)	[2]	(3,009)	[2]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(537)	[2]	0	[2]	0	[2]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	292	[2]	0	[2]	0	[2]
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income, Effective Portion, Net	(243)	[3]	1,012	[3]	(711)	[3]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	439	[3]	(54)	[3]	53	[3]
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0	[3]	0	[3]	0	[3]
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Accrued Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	(203)		(45)
Cash Flow Hedging [Member] | Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] | Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative, Fair Value, Net	368		433
Greentech [Member]
Derivatives, Fair Value [Line Items]
Business Acquisition, Contingent Consideration, Potential Cash Payment	6,000
Waching [Member]
Derivatives, Fair Value [Line Items]
Business Acquisition, Contingent Consideration, Potential Cash Payment	5,400
Seed [Member]
Derivatives, Fair Value [Line Items]
Business Acquisition, Contingent Consideration, Potential Cash Payment	$ 18,000

[1] The amount of gain (loss) recognized in income on derivatives is recorded in "Cost of sales" in the company's consolidated statements of operations.

[2] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Interest and other financing expense, net" in the company's consolidated statements of operations.

[3] Both the effective and ineffective portions of any gain (loss) reclassified or recognized in income are recorded in "Cost of sales" in the company's consolidated statements of operations.