Stockholders' Equity and Accumulated Other Comprehensive Loss (Details) (USD $)	0 Months Ended		1 Months Ended	3 Months Ended		12 Months Ended
	Apr. 04, 2015	Mar. 29, 2014	Dec. 31, 2012	Apr. 04, 2015	Mar. 29, 2014	Dec. 31, 2012	Dec. 31, 2014
Stockholders' Equity and Accumulated Other Comprehensive Loss
Remaining authorized repurchase amount under November 2009 share repurchase program	$ 50,846,000			$ 50,846,000
Common stock dividend declared and paid (in dollars per share)			$ 12.00
Common stock dividend historical amount on a quarterly basis (in dollars per share)						$ 0.75
Common stock dividend historical amount on annual basis (in dollars per share)						$ 3.00
Portion of dividend serving as prepayment for next succeeding year (in dollars per share)			$ 3.00
Portion of dividend serving as prepayment for second succeeding year (in dollars per share)			$ 3.00
Portion of dividend serving as prepayment for third succeeding year (in dollars per share)			$ 3.00
Portion of dividend serving as prepayment for fourth succeeding year (in dollars per share)			$ 3.00
Changes in the components of other comprehensive loss (OCL), net of related taxes
Foreign currency translation adjustment				(5,958,000)	(26,775,000)
Investments:
Unrealized gain (loss) on investments				736,000	15,000
Amount reclassified from OCL to net earnings				(59,000)	511,000
Unrealized gain (loss) on investments				677,000	526,000
Unrealized gain on cash flow hedges					361,000
Pension Cost:
Unrealized gain				299,000
Amount reclassified from OCL to net earnings				983,000	320,000
Unrecognized pension cost				1,282,000	320,000
Other comprehensive loss, net of tax				(3,999,000)	(25,568,000)
Components of accumulated other comprehensive loss, net of related taxes
Accumulated other comprehensive loss	(256,636,000)			(256,636,000)			(252,637,000)
Income tax rate for foreign currency translation gains and losses (as a percent)	35.00%				35.00%
Cumulative foreign currency translation adjustment, net of related taxes	60,076,000	49,411,000		60,076,000	49,411,000
Tax benefit recorded on foreign currency translation adjustments	0	0
Tax benefit recorded on unrecognized pension cost	0				0
Effective income tax rate for components of accumulated other comprehensive loss (as a percent)	39.00%				39.00%
Unrecognized pension cost related to employees at certain subsidiaries	19,960,000	8,580,000		19,960,000	8,580,000
Argentine pesos | Sugar
Components of accumulated other comprehensive loss, net of related taxes
Net assets of Sugar segment	119,734,000			119,734,000
U.S. dollars | Sugar
Components of accumulated other comprehensive loss, net of related taxes
Net assets of Sugar segment	1,199,000			1,199,000
Cumulative Foreign Currency Translation Adjustment:
Components of accumulated other comprehensive loss, net of related taxes
Accumulated other comprehensive loss	(199,995,000)			(199,995,000)			(194,037,000)
Unrealized Gain (Loss) on Investments:
Components of accumulated other comprehensive loss, net of related taxes
Accumulated other comprehensive loss	2,011,000			2,011,000			1,334,000
Unrecognized Pension Cost:
Components of accumulated other comprehensive loss, net of related taxes
Accumulated other comprehensive loss	$ (58,652,000)			$ (58,652,000)			$ (59,934,000)