ACCOUNTING POLICIES (Details) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Cash equivalents
Cash equivalents	$ 56,100,000	$ 76,200,000
Restricted cash
Restricted cash	1,780,000	1,905,000
Total
Assets:
Cash equivalents - Money market mutual funds	56,070,000	76,248,000
Trading securities held in a "rabbi trust"	200,000	264,000
Total assets	56,270,000	76,512,000
Liabilities:
Deferred compensation accrual "rabbi trust"	255,000	266,000
Restructuring	620,000	65,000
Total liabilities	875,000	331,000
Level 1
Assets:
Cash equivalents - Money market mutual funds	56,070,000	76,248,000
Trading securities held in a "rabbi trust"	200,000	264,000
Total assets	56,270,000	76,512,000
Liabilities:
Deferred compensation accrual "rabbi trust"	255,000	266,000
Total liabilities	255,000	266,000
Level 3
Liabilities:
Restructuring	620,000	65,000
Total liabilities	$ 620,000	$ 65,000