QUARTERLY RESULTS OF OPERATIONS - UNAUDITED - Schedule of Unaudited Quarterly Results of Operations (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2015
Quarterly Financial Information Disclosure [Abstract]
Revenue	$ 318,920	$ 302,192	$ 272,048	$ 268,952	$ 285,887	$ 307,679	$ 261,110	$ 100,743	$ 1,162,112	$ 955,419	$ 453,669
Gross profit	226,003	220,514	187,538	181,918	185,036	201,564	160,923	79,447	815,973	626,970	359,108
Net income (loss)	$ 22,310	$ 21,245	$ (1,266)	$ (8,998)	$ (3,616)	$ (24,507)	$ (7,915)	$ 7,669	$ 33,291	$ (28,369)	$ 61,192
Diluted net income (loss) per share (in dollars per share)	$ 0.24	$ 0.23	$ (0.01)	$ (0.10)	$ (0.04)	$ (0.25)	$ (0.09)	$ 0.19	$ 0.36	$ (0.35)	$ 1.47