RECENT ACCOUNTING PRONOUNCEMENTS - Cumulative Effect of Adoption of Topic 606 on Balance Sheet (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Apr. 01, 2018	Mar. 31, 2018
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	$ 363,837	$ 167,109	$ 152,888
Other current assets	48,229		18,588
Total current assets	913,863	913,947	899,726
Deferred tax assets	4,741	17,457	17,950
Other assets	22,821		1,584
Total assets	3,297,781	1,090,615	1,076,887
Accrued liabilities	452,194	91,230	80,097
Total current liabilities	598,261	136,647	125,514
Other long-term liabilities	134,492		18,566
Total liabilities	2,553,563	735,050	723,917
Retained earnings	170,861	301,661	299,066
Total stockholders' equity before treasury stock	1,589,289	1,181,992	1,179,397
Total stockholders' equity	744,218	355,565	352,970
Total liabilities and stockholders' equity	3,297,781	1,090,615	$ 1,076,887
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	272,702
Other current assets	47,762
Total current assets	822,261
Other assets	21,169
Total assets	3,204,527
Accrued liabilities	369,832
Total current liabilities	515,899
Other long-term liabilities	132,726
Total liabilities	2,469,434
Retained earnings	161,736
Total stockholders' equity before treasury stock	1,580,164
Total stockholders' equity	735,093
Total liabilities and stockholders' equity	3,204,527
Accounting Standards Update 2014-09 [Member] | Difference between Revenue Guidance in Effect before and after Topic 606 [Member]
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accounts receivable, net	(91,135)	14,221
Other current assets	(467)
Total current assets	(91,602)	14,221
Deferred tax assets		(493)
Other assets	(1,652)
Total assets	(93,254)	13,728
Accrued liabilities	(82,362)	11,133
Total current liabilities	(82,362)	11,133
Other long-term liabilities	(1,766)
Total liabilities	(84,129)	11,133
Retained earnings	(9,125)	2,595
Total stockholders' equity before treasury stock	(9,125)	2,595
Total stockholders' equity	(9,125)	2,595
Total liabilities and stockholders' equity	$ (93,254)	$ 13,728