EMPLOYEE BENEFIT PLANS (Details 4) (Nonunion Defined Benefit Pension Plan, USD $)																																											12 Months Ended
	Dec. 31, 2012	Jan. 02, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Maximum	Dec. 31, 2012 Minimum	Dec. 31, 2012 Cash and Cash Equivalents	Dec. 31, 2011 Cash and Cash Equivalents	Dec. 31, 2012 Debt Instruments	Dec. 31, 2011 Debt Instruments	Dec. 31, 2012 Floating Rate Loan	Dec. 31, 2011 Floating Rate Loan	Dec. 31, 2012 Large Cap U.S. Equity	Dec. 31, 2011 Large Cap U.S. Equity	Dec. 31, 2012 Mid Cap U.S. Equity	Dec. 31, 2011 Mid Cap U.S. Equity	Dec. 31, 2012 Small Cap U.S. Equity	Dec. 31, 2011 Small Cap U.S. Equity	Dec. 31, 2012 International Equity	Dec. 31, 2011 International Equity	Dec. 31, 2012 Emerging Market Equity	Dec. 31, 2011 Emerging Market Equity	Dec. 31, 2012 Level 1	Dec. 31, 2011 Level 1	Dec. 31, 2012 Level 1 Cash and Cash Equivalents	Dec. 31, 2011 Level 1 Cash and Cash Equivalents	Dec. 31, 2012 Level 1 Floating Rate Loan	Dec. 31, 2011 Level 1 Floating Rate Loan	Dec. 31, 2012 Level 1 Large Cap U.S. Equity	Dec. 31, 2011 Level 1 Large Cap U.S. Equity	Dec. 31, 2012 Level 1 Mid Cap U.S. Equity	Dec. 31, 2011 Level 1 Mid Cap U.S. Equity	Dec. 31, 2012 Level 1 Small Cap U.S. Equity	Dec. 31, 2011 Level 1 Small Cap U.S. Equity	Dec. 31, 2012 Level 1 International Equity	Dec. 31, 2011 Level 1 International Equity	Dec. 31, 2012 Level 1 Emerging Market Equity	Dec. 31, 2011 Level 1 Emerging Market Equity	Dec. 31, 2012 Level 2	Dec. 31, 2011 Level 2	Dec. 31, 2012 Level 2 Debt Instruments	Dec. 31, 2011 Level 2 Debt Instruments	Dec. 31, 2012 Level 2 Mortgage-backed instruments	Dec. 31, 2012 Level 2 Corporate debt securities	Dec. 31, 2011 Level 2 Corporate debt securities	Dec. 31, 2012 Level 2 Treasury instruments	Dec. 31, 2012 Level 2 Municipal debt securities	Dec. 31, 2011 Level 2 Municipal debt securities	Dec. 31, 2012 Level 2 Asset-backed securities	Dec. 31, 2011 Level 2 Asset-backed securities
Employee Benefit Plans
Fair value of plan assets	$ 181,225,000		$ 161,249,000	$ 180,351,000			$ 5,752,000	$ 21,837,000	$ 40,556,000	$ 26,839,000	$ 7,244,000	$ 6,523,000	$ 58,210,000	$ 50,190,000	$ 20,226,000	$ 16,560,000	$ 20,044,000	$ 16,949,000	$ 20,046,000	$ 13,458,000	$ 9,147,000	$ 8,893,000	$ 140,669,000	$ 134,410,000	$ 5,752,000	$ 21,837,000	$ 7,244,000	$ 6,523,000	$ 58,210,000	$ 50,190,000	$ 20,226,000	$ 16,560,000	$ 20,044,000	$ 16,949,000	$ 20,046,000	$ 13,458,000	$ 9,147,000	$ 8,893,000	$ 40,556,000	$ 26,839,000	$ 40,556,000	$ 26,839,000
Percentage of investments in debt instruments																																											34.00%	33.00%	83.00%	23.00%	5.00%	14.00%	5.00%	3.00%
Estimated contribution in next fiscal year					$ 10,000,000	$ 8,000,000
Adjusted funding target attainment percentage		90.00%
Adjusted funding target attainment percentage to be maintained						80.00%