VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Valuation and Qualifying Accounts Disclosure [Line Items]
Provisions for doubtful accounts, service credits and other		$ 1,290	$ 1,128
Allowance for Doubtful Accounts, Service Credits and Other
Valuation and Qualifying Accounts Disclosure [Line Items]
Provisions for doubtful accounts, service credits and other	$ 761
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of the Period	1,286	1,300	2,221
Charged to Operations		1,290	1,128
Write-offs	(991)	(1,304)	(2,049)
Balance at the End of the Period	1,056	1,286	1,300
Inventory Excess and Obsolete Reserves
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of the Period	214	175	75
Charged to Operations	0	1,066	100
Write-offs	(214)	(1,027)	0
Balance at the End of the Period	0	214	175
Deferred Income Tax Asset Valuation Allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at the Beginning of the Period	50,031	114,190	119,277
Charged to Operations	0	0	0
Write-offs	(50,031)	(64,159)	(5,087)
Balance at the End of the Period	$ 0	$ 50,031	$ 114,190