ACCRUAL FOR TERMITE CONTRACTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of changes in the accrual for termite contracts
Balance at the beginning of the period	$ 8,925,000	$ 10,000,000
Current year provision	5,619,000	5,816,000
Settlements, claims, and expenditures	(4,244,000)	(6,891,000)
Balance at the end of the period	10,300,000	8,925,000
Accrual for termite contracts, portion included in other current liabilities	3,700,000	2,700,000
Accrual for termite contracts, portion included in long-term accrued liabilities	$ 6,600,000	$ 6,200,000