BASIS OF PRESENTATION, CONSOLIDATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Impact of Changes in Foreign Currency Exchange Rate (Details) - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018
Schedule of Foreign Currency [Line Items]
Revenue	$ 367,894	$ 352,109
Operating expense	(366,997)	(375,569)
Earnings from unconsolidated affiliates, net of losses	(3,017)	(665)
Loss before benefit (provision) for income taxes	(34,892)	(42,255)
Provision for income taxes	2,851	(13,491)
Net income (loss)	(32,041)	$ (55,746)
Total stockholders’ investment	1,120,644		$ 1,178,144
Year To Date | Impact of Changes in Foreign Currency Exchange Rates
Schedule of Foreign Currency [Line Items]
Revenue	10,450
Operating expense	(5,301)
Earnings from unconsolidated affiliates, net of losses	(1,454)
Non-operating expense	(1,351)
Loss before benefit (provision) for income taxes	2,344
Provision for income taxes	445
Net income (loss)	2,789
Cumulative translation adjustment	(29,172)
Total stockholders’ investment	$ (26,383)