ACCOUNTING POLICIES (Details) (USD $)	Jun. 30, 2013	Dec. 31, 2012
Cash equivalents
Cash equivalents	$ 51,100,000	$ 76,200,000
Restricted cash
Restricted cash	1,780,000	1,905,000
Total
Assets:
Cash equivalents - Money market mutual funds	51,074,000	76,248,000
Trading securities held in a "rabbi trust"	221,000	264,000
Total assets	51,295,000	76,512,000
Liabilities:
Deferred compensation accrual "rabbi trust"	285,000	266,000
Restructuring	581,000	65,000
Total liabilities	866,000	331,000
Level 1
Assets:
Cash equivalents - Money market mutual funds	51,074,000	76,248,000
Trading securities held in a "rabbi trust"	221,000	264,000
Total assets	51,295,000	76,512,000
Liabilities:
Deferred compensation accrual "rabbi trust"	285,000	266,000
Total liabilities	285,000	266,000
Level 3
Liabilities:
Restructuring	581,000	65,000
Total liabilities	$ 581,000	$ 65,000