UNAUDITED SELECTED QUARTERLY FINANCIAL DATA: (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2014
UNAUDITED SELECTED QUARTERLY FINANCIAL DATA:
Revenue	$ 224,655	$ 221,193	$ 207,345	$ 196,895	$ 205,734	$ 208,246	$ 204,248	$ 186,683	$ 850,088	$ 804,911	$ 805,153
Gross profit	101,029	95,458	86,033	79,186	78,026	82,439	79,290	71,119	361,706	310,874	299,636
Loss from operations	(7,764)	(374)	(2,056)	(2,869)	(10,865)	(2,290)	(6,443)	(13,086)	(13,063)	(32,684)	1,557
Earnings (loss) from discontinued operations, net of tax	111	(971)	12,068	4,143	2,998	3,819	5,557	3,137	15,351	15,511	26,143
Net earnings (loss)	$ (1,571)	$ (1,410)	$ 10,723	$ (1,039)	$ (6,039)	$ 4,156	$ (1,544)	$ (7,604)	$ 6,703	$ (11,031)	$ 8,863
Basic earnings (loss) per share:
Continuing operations (in dollars per share)	$ (0.02)	$ (0.01)	$ (0.02)	$ (0.07)	$ (0.12)	$ 0.00	$ (0.09)	$ (0.14)
Discontinued operations (in dollars per share)	0.00	(0.01)	0.15	0.05	0.04	0.05	0.07	0.04	$ 0.20	$ 0.20	$ 0.35
Net earnings (loss) (in dollars per share)	(0.02)	(0.02)	0.14	(0.01)	(0.08)	0.05	(0.02)	(0.10)	0.09	(0.14)	0.12
Diluted earnings (loss) per share:
Continuing operations (in dollars per share)	(0.02)	(0.01)	(0.02)	(0.07)	(0.12)	0.00	(0.09)	(0.14)
Net earnings from discontinued operations (in dollars per share)	0.00	(0.01)	0.15	0.05	0.04	0.05	0.07	0.04	0.20	0.20	0.35
Net earnings (loss) (in dollars per share)	$ (0.02)	$ (0.02)	$ 0.14	$ (0.01)	$ (0.08)	$ 0.05	$ (0.02)	$ (0.10)	$ 0.09	$ (0.14)	$ 0.12