CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2011
CONSOLIDATED STATEMENTS OF OPERATIONS
Net revenue	$ 299,487	$ 415,773	$ 273,084	$ 226,139	$ 148,084	$ 236,325	$ 107,034	$ 334,380	$ 1,214,483	$ 825,823	$ 1,136,876
Cost of goods sold	154,320	216,299	158,487	186,731	116,466	126,467	74,703	211,219	715,837	528,855	689,381
Gross profit	145,167	199,474	114,597	39,408	31,618	109,858	32,331	123,161	498,646	296,968	447,495
Selling and marketing	51,747	60,724	65,851	79,007	40,065	40,228	28,773	74,683	257,329	183,749	176,294
General and administrative	40,369	32,880	30,809	43,202	35,133	29,705	25,785	30,577	147,260	121,200	109,484
Research and development	21,183	22,369	19,320	15,312	14,822	16,823	15,998	16,519	78,184	64,162	69,576
Depreciation and amortization	2,806	2,509	2,550	2,769	2,740	2,854	3,284	3,245	10,634	12,123	14,999
Total operating expenses	116,105	118,482	118,530	140,290	92,760	89,610	73,840	125,024	493,407	381,234	370,353
Income (loss) from operations	29,062	80,992	(3,933)	(100,882)	(61,142)	20,248	(41,509)	(1,863)	5,239	(84,266)	77,142
Interest and other, net	(7,789)	(8,094)	(7,419)	(8,049)	(5,368)	(6,190)	(4,333)	(3,680)	(31,351)	(19,571)	(13,519)
Income (loss) from continuing operations before income taxes	21,273	72,898	(11,352)	(108,931)	(66,510)	14,058	(45,842)	(5,543)	(26,112)	(103,837)	63,623
Provision for income taxes	103	2,021	1,085	1,841	(505)	(127)	1,419	3,076	5,050	3,863	9,819
Income (loss) from continuing operations	21,170	70,877	(12,437)	(110,772)	(66,005)	14,185	(47,261)	(8,619)	(31,162)	(107,700)	53,804
Income (loss) from discontinued operations, net of taxes	1,303	488	(54)	(66)	(831)	(81)	(110)	(94)	1,671	(1,116)	(5,346)
Net income (loss)	$ 22,473	$ 71,365	$ (12,491)	$ (110,838)	$ (66,836)	$ 14,104	$ (47,371)	$ (8,713)	$ (29,491)	$ (108,816)	$ 48,458
Earnings (loss) per share:
Continuing operations (in dollars per share)	$ 0.23	$ 0.76	$ (0.15)	$ (1.30)	$ (0.78)	$ 0.16	$ (0.57)	$ (0.11)	$ (0.36)	$ (1.30)	$ 0.62
Discontinued operations (in dollars per share)	$ 0.01				$ (0.01)				$ 0.02	$ (0.01)	$ (0.06)
Basic earnings (loss) per share (in dollars per share)	$ 0.24	$ 0.76	$ (0.15)	$ (1.30)	$ (0.79)	$ 0.16	$ (0.57)	$ (0.11)	$ (0.34)	$ (1.31)	$ 0.56
Continuing operations (in dollars per share)	$ 0.23	$ 0.66	$ (0.15)	$ (1.30)	$ (0.78)	$ 0.16	$ (0.57)	$ (0.11)	$ (0.36)	$ (1.30)	$ 0.62
Discontinued operations (in dollars per share)	$ 0.01				$ (0.01)				$ 0.02	$ (0.01)	$ (0.06)
Diluted earnings (loss) per share (in dollars per share)	$ 0.24	$ 0.66	$ (0.15)	$ (1.30)	$ (0.79)	$ 0.16	$ (0.57)	$ (0.11)	$ (0.34)	$ (1.31)	$ 0.56