INCOME TAXES (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
INCOME TAXES
Effective tax rate (as a percent)	27.50%	25.10%	26.70%	30.70%
Deferred Tax Benefit	$ 1,300		$ 1,300
Benefit to record return to accrual adjustment				$ 585
Benefit (net) to record a valuation allowance adjustment on an indefinite lived intangible asset		$ 1,400		1,400
Interest expense on unrecognized tax benefits	$ 500	1,500		2,000
Income tax benefit from reversal of deferred tax liability due to intercompany debt restructure			$ 500
Income tax benefit from release of capital loss valuation allowance due to capital gain on sale of a wireless license				514
Income tax benefit from provision for intercompany sale of assets				$ 695
Benefit (net) to record a return to accrual adjustment		$ 500