SHAREHOLDER'S EQUITY (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended			9 Months Ended	12 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2016	Dec. 31, 2018	Dec. 31, 2016
Dividends And Shares Activitiy [Line Items]
Dvidend Equivalent liability - short term	$ 1,878			$ 1,279
Dvidend Equivalent liability - long term	888			1,041
Total Dividend Equivalent Liability	$ 2,766			2,320
CommonStockDividendsPerShareDeclared	$ 0.36
Dividend payments	$ 12,430	$ 12,441	$ 2,900
Amount recorded as financing activity	$ (1,426)	(3,463)		(1,723)
The total cost to repurchase		(19,379)		(10,028)
Employee stock purchase plan, authorized shares	1,000
Stock Issued During Period Value Employee Stock Purchase Plan	$ 379	321		$ 1,107
Total Non cash compensation expense recognized	$ 2,825	3,097
Espp Shares Market Value	85.00%
Espp Share Discount	15.00%
PaymentsOfDividendsAbstract
Payments of Dividends, Common Stock	$ 12,430	12,441	$ 2,900
PaymentsOfDividendsPreferredStockAndPreferenceStock	0	$ 0
Treasury Stock Line Items
Stock Repurchase Prgram Authorized Amount	$ 100,000
Dividends
Dividends And Shares Activitiy [Line Items]
CommonStockDividendsPerShareDeclared					$ 0.3
ESPP [Member]
Dividends And Shares Activitiy [Line Items]
Stock Issued During Period Shares Employee Stock Purchase Plans	85	39
Total Non cash compensation expense recognized	$ 67	$ 57