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ACQUISITIONS (Details)			1 Months Ended	12 Months Ended
	Dec. 31, 2011 GBP (£)	Dec. 25, 2010 GBP (£)	May 31, 2010 Delta, plc. GBPPerShare	Dec. 25, 2010 Delta, plc. USD ($)	Dec. 26, 2009 Delta, plc. USD ($)	May 12, 2010 Delta, plc. USD ($)	May 12, 2010 Delta, plc. GBP (£)	May 12, 2010 Delta, plc. Minimum employee	Jun. 24, 2011 Donhad USD ($)	Jun. 01, 2011 Irrigation monitoring services company USD ($)
Acquisition
Price paid per share in cash			0.185
Cash paid for acquisition						$ 436,736	£ 284,463		$ 25,253,000	$ 1,539,000
Average exchange rate (in dollars per pound)	1.5425	1.5442					1.5353
Number of employees								2,500
Pro forma results of operations
Net sales				2,167,923,000	2,307,949,000
Net earnings				$ 99,614,000	$ 165,863,000
Earnings per share-diluted				$ 3.77	$ 6.31
Ownership percentage acquired									40.00%	60.00%

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