INCOME TAXES - CREDIT CARRYFORWARDS (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Domestic Tax Authority
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 150,811
Domestic Tax Authority | Expire 2031 to 2036
Tax Credit Carryforward [Line Items]
Tax credit carryforward	83,371
Foreign
Tax Credit Carryforward [Line Items]
Tax credit carryforward	1,691
Foreign | Expire 2019
Tax Credit Carryforward [Line Items]
Tax credit carryforward	1,037
Foreign | Expire 2028
Tax Credit Carryforward [Line Items]
Tax credit carryforward	191
Foreign | Expire 2029
Tax Credit Carryforward [Line Items]
Tax credit carryforward	80
Foreign | Expire 2030
Tax Credit Carryforward [Line Items]
Tax credit carryforward	230
Foreign | Expire 2031
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 153