EMPLOYEE BENEFIT PLANS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
401(k) Savings Plan
Maximum percentage of gross pay eligible for a matching contribution up to 75%	4.00%
Maximum percentage of the employee's contribution matched by the employer	75.00%
Maximum employer matching contribution per employee as a percent of employee's gross pay	3.00%
Matching expense from continuing operations under 401(k) Savings Plan	$ 1,046	$ 1,021	$ 946
Matching expense from discontinued operations under 401(k) Savings Plan	20	22	29
Incentive Bonus Plans
Incentive or deferred bonus plans and deferred compensation plan
Number of sponsored incentive bonus plans	2
Expense under the plans	7,034	7,874	5,030
Incentive Bonus Plans | Maximum
Incentive or deferred bonus plans and deferred compensation plan
Percentage of annual incentive bonus, which can be deferred	100.00%
Deferred Bonus Plan
Incentive or deferred bonus plans and deferred compensation plan
Expense under the plans	10	15	11
Period for which annual bonus can be deferred over one time period	3 years
Period for which annual bonus can be deferred over a second time period	5 years
Period for which annual bonus can be deferred over a third time period	10 years
Percentage of the employee's contribution matched by employer	10.00%
Vesting period	3 years
Total amounts deferred	1,390	960
Deferred Compensation Plan
Incentive or deferred bonus plans and deferred compensation plan
Expense under the plans	$ 405
Percentage of employee's contribution vested in the plan	100.00%
Deferred Compensation Plan | Minimum
Incentive or deferred bonus plans and deferred compensation plan
Payout period time for payments after retirement	2 years
Deferred Compensation Plan | Maximum
Incentive or deferred bonus plans and deferred compensation plan
Percentage of annual base pay, which can be deferred	50.00%
Payout period time for payments after retirement	10 years