INCOME TAXES (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Operating loss carryforwards
Income taxes paid, net of refunds received	$ 40,800	$ 18,600	$ 18,300
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		4.40%	3.50%	3.70%
Effect of tax rates of other countries		(2.40%)	(0.40%)	0.20%
Section 199 deduction		(0.90%)	(1.20%)	(1.70%)
Change in Contingency Reserve		(0.20%)	0.70%	2.00%
Limitation on deduction of officer’s compensation		0.50%	1.50%	2.60%
Other		(0.20%)	(0.60%)	(1.40%)
Effective tax rate		36.20%	38.50%	40.40%
Undistributed Earnings of Foreign Subsidiaries, Gross		$ 104,200
Undistributed Earnings of Foreign Subsidiaries, Not To Be Reinvested		12,400
Undistributed Earnings of Foreign Subsidiaries		91,800
Unrecognized tax benefits, which would reduce the effective tax rate if recognized	4,400	4,900
Activity related to unrecognized tax benefits
Balance, beginning of the year	4,922	4,611	$ 4,039
Additions for tax position related to the current year	125	125	691
Additions for tax position related to the prior year	134	350	0
Decreases for tax position related to the prior year	(774)	0	0
Prior year reductions:
Lapse of statute of limitations	0	(164)	(119)
Balance, end of the year	4,407	4,922	4,611	$ 4,039
Unrecognized Tax Benefits, Prior Period Adjustment		3,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense		200	200	$ 200
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued		$ 500	$ 500
Foreign
Operating loss carryforwards
Net operating loss carryforwards	$ 29,400