SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 3) (USD $)	12 Months Ended
	Dec. 31, 2013 item	Dec. 31, 2012	Dec. 31, 2011
Business Segments
Number of business segments	4
Capitalization of Interest
Interest capitalized	$ 7,000,000	$ 9,200,000	$ 7,600,000
Weighted average rates used to capitalize interest on borrowed funds (as a percent)	4.70%	4.50%	4.20%
Activity in the allowance for doubtful accounts
Balance at beginning of period	3,425,000	2,348,000	2,893,000
Charged to expense	6,000	1,533,000	200,000
Write-offs, net of recoveries	(1,412,000)	(456,000)	(745,000)
Balance at end of period	2,019,000	3,425,000	2,348,000
Equity Investments
Impairments of equity investments	$ 0	$ 0	$ 0