INCOME TAXES (Details 2) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Operating loss carryforwards
Income taxes paid, net of refunds received		$ 22,400,000	$ 27,400,000	$ 40,800,000
Estimated benefit from valuation allowance release	$ 28,300,000
Reconciliation of statutory federal income tax rate to the effective income tax rate
Federal statutory tax rate		35.00%	35.00%	35.00%
Increase (decrease) in the tax rate resulting from:
State taxes, net of federal effect		5.20%	3.30%	4.40%
Effect of tax rates of other countries		(1.80%)	(1.40%)	(2.40%)
Section 199 deduction		(0.70%)	(0.80%)	(0.90%)
Change in contingency reserve		0.00%	(0.20%)	(0.20%)
Limitation on deduction of officer’s compensation		1.30%	0.60%	0.50%
Tax Act		(33.90%)	0.00%	0.00%
Valuation Allowance Release		(3.30%)	0.00%	0.00%
Other		(3.80%)	(0.90%)	(0.20%)
Effective tax rate		(2.00%)	35.60%	36.20%
Estimated benefit as a result of the new legislation	26,600,000
One-time repatriation tax on accumulated foreign earnings	150,000
Deferred tax liability for the withholding tax on distribution of accumulated foreign earnings	1,540,000	$ 1,540,000
Activity related to unrecognized tax benefits
Balance, beginning of the year		875,000	$ 4,407,000	$ 4,922,000
Additions for tax position related to the current year		125,000	125,000	125,000
Additions for tax position related to the prior year		0	56,000	134,000
Decreases for tax position related to the prior year		0	(250,000)	(774,000)
Prior year reductions:
Lapse of statute of limitations		(125,000)	(125,000)	0
Settlements		0	(3,338,000)	0
Balance, end of the year	875,000	875,000	875,000	4,407,000
Interest and penalties		0	$ 100,000	$ 100,000
Accruals for payments of interest and penalties	0	0
Foreign
Operating loss carryforwards
Net operating loss carryforwards	$ 30,000,000	30,000,000
Estimated benefit from valuation allowance release		$ 2,600,000