Restatement of the Consolidated Financial Statements - Effects of Restatements of Consolidated Statement of Operations and Comprehensive Income (Loss) (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Product sales									$ 401,039	$ 405,147	$ 432,845
Marketing service fees									46,542	36,824	29,726
Net Sales	117,365	107,857	113,423	108,936	118,639	111,510	108,216	103,606	447,581	441,971	462,571
Cost of sales	24,944	24,384	27,547	21,378	27,300	23,126	22,755	22,346	98,253	95,527	97,093
Gross profit	92,421	83,473	85,876	87,558	91,339	88,384	85,461	81,260	349,328	346,444	365,478
Operating expenses
Sales and marketing									187,131	193,511	196,113
General and administrative									53,391	64,481	73,010
Research and development									28,577	22,861	27,958
Amortization of intangible assets									2,298	2,550	2,413
Charges related to U.S. Government resolutions (Note 17)									1,295	57,141
Total operating expenses	66,808	64,668	71,578	69,638	83,165	67,417	73,102	116,860	272,692	340,544	299,494
Operating income	25,613	18,805	14,298	17,920	8,174	20,967	12,359	(35,600)	76,636	5,900	65,984
Other income and (expense)
Interest expense, net									(4,743)	(5,541)	(11,287)
Other expense									(1,705)	(2,412)	331
Total other income (expense)									(6,448)	(7,953)	(10,956)
Income (loss) before income taxes									70,188	(2,053)	55,028
Income tax (expense) benefit									(25,138)	(14,165)	(24,031)
Net income (loss) from continuing operations, net of tax	16,009	10,574	9,870	8,597	7,652	11,300	6,579	(41,749)	45,050	(16,218)	30,997
Discontinued operations (Note 16)
Gain on sale of Breg, Inc., net of tax									1,345
Gain on sale of vascular operations, net of tax (Note 22)											8,521
Income (loss) from discontinued operations									(2,994)	(2,705)	5,089
Income tax benefit (expense)									(563)	813	(311)
Net income (loss) from discontinued operations, net of tax	5,152	(5,558)	(2,616)	810	235	(1,225)	(1,184)	282	(2,212)	(1,892)	13,299
Net income (loss)									42,838	(18,110)	44,296
Net income (loss) per common share-basic:
Net income (loss) from continuing operations, net of tax	$ 0.83	$ 0.55	$ 0.52	$ 0.46	$ 0.42	$ 0.61	$ 0.36	$ (2.33)	$ 2.37	$ (0.89)	$ 1.76
Net income (loss) from discontinued operations, net of tax	$ 0.27	$ (0.29)	$ (0.14)	$ 0.04	$ 0.01	$ (0.07)	$ (0.07)	$ 0.02	$ (0.12)	$ (0.10)	$ 0.76
Net income (loss) per common share-basic	$ 1.10	$ 0.26	$ 0.38	$ 0.50	$ 0.43	$ 0.54	$ 0.29	$ (2.31)	$ 2.25	$ (0.99)	$ 2.52
Net income (loss) per common share-diluted:
Net income (loss) from continuing operations, net of tax	$ 0.81	$ 0.54	$ 0.51	$ 0.45	$ 0.41	$ 0.60	$ 0.35	$ (2.33)	$ 2.32	$ (0.89)	$ 1.73
Net income (loss) from discontinued operations, net of tax	$ 0.26	$ (0.29)	$ (0.14)	$ 0.04	$ 0.01	$ (0.06)	$ (0.06)	$ 0.02	$ (0.11)	$ (0.10)	$ 0.74
Net income (loss) per common share-diluted:	$ 1.07	$ 0.25	$ 0.37	$ 0.49	$ 0.42	$ 0.54	$ 0.29	$ (2.31)	$ 2.21	$ (0.99)	$ 2.47
Weighted average number of common shares:
Basic									18,977,263	18,219,343	17,601,956
Diluted									19,390,413	18,219,343	17,913,545
Other comprehensive income (loss), before tax:
Translation adjustment									768	(2,279)	(1,317)
Unrealized gain (loss) on derivative instrument									416	(693)	(126)
Other comprehensive income (loss), before tax									1,184	(2,972)	(1,443)
Income tax (expense) benefit related to components of other comprehensive income	(153)				256				(153)	256	36
Other comprehensive income (loss), net of tax									1,031	(2,716)	(1,407)
Comprehensive income (loss)									43,869	(20,826)	42,889
Previously Reported [Member]
Product sales									415,850	432,975	430,783
Marketing service fees									46,470	37,146	29,846
Net Sales	112,035	114,752	119,492	116,041	123,085	117,306	116,670	113,060	462,320	470,121	460,629
Cost of sales	18,504	22,373	23,676	21,939	23,239	23,854	23,186	22,340	86,492	92,619	90,461
Gross profit	93,531	92,379	95,816	94,102	99,846	93,452	93,484	90,720	375,828	377,502	370,168
Operating expenses
Sales and marketing									200,343	200,145	200,835
General and administrative									53,827	64,374	72,912
Research and development									28,577	22,861	27,958
Amortization of intangible assets									2,098	2,350	2,213
Charges related to U.S. Government resolutions (Note 17)									1,973	56,463
Total operating expenses	69,050	70,846	75,251	71,671	84,035	69,853	74,088	118,217	286,818	346,193	303,918
Operating income	24,481	21,533	20,565	22,431	15,811	23,599	19,396	(27,497)	89,010	31,309	66,250
Other income and (expense)
Interest expense, net									(4,577)	(9,456)	(16,217)
Other expense									(1,705)	(2,412)	331
Total other income (expense)									(6,282)	(11,868)	(15,886)
Income (loss) before income taxes									82,728	19,441	50,364
Income tax (expense) benefit									(28,792)	(21,181)	(22,606)
Net income (loss) from continuing operations, net of tax	14,636	13,118	13,967	12,215	11,530	12,951	10,519	(36,740)	53,936	(1,740)	27,758
Discontinued operations (Note 16)
Gain on sale of Breg, Inc., net of tax									1,345
Gain on sale of vascular operations, net of tax (Note 22)											12,019
Income (loss) from discontinued operations									(4,012)	1,263	10,015
Income tax benefit (expense)									26	(596)	(5,584)
Net income (loss) from discontinued operations, net of tax	5,878	(5,558)	(2,762)	(199)	862	(573)	(561)	939	(2,641)	667	16,450
Net income (loss)									51,295	(1,073)	44,208
Net income (loss) per common share-basic:
Net income (loss) from continuing operations, net of tax	$ 0.76	$ 0.69	$ 0.74	$ 0.65	$ 0.62	$ 0.70	$ 0.58	$ (2.05)	$ 2.84	$ (0.10)	$ 1.58
Net income (loss) from discontinued operations, net of tax	$ 0.30	$ (0.29)	$ (0.15)	$ (0.01)	$ 0.05	$ (0.03)	$ (0.03)	$ 0.05	$ (0.14)	$ 0.04	$ 0.93
Net income (loss) per common share-basic	$ 1.06	$ 0.40	$ 0.59	$ 0.64	$ 0.67	$ 0.67	$ 0.55	$ (2.00)	$ 2.70	$ (0.06)	$ 2.51
Net income (loss) per common share-diluted:
Net income (loss) from continuing operations, net of tax	$ 0.74	$ 0.67	$ 0.73	$ 0.64	$ 0.62	$ 0.69	$ 0.57	$ (2.05)	$ 2.78	$ (0.10)	$ 1.55
Net income (loss) from discontinued operations, net of tax	$ 0.30	$ (0.28)	$ (0.15)	$ (0.01)	$ 0.04	$ (0.03)	$ (0.03)	$ 0.05	$ (0.14)	$ 0.04	$ 0.92
Net income (loss) per common share-diluted:	$ 1.04	$ 0.39	$ 0.58	$ 0.63	$ 0.66	$ 0.66	$ 0.54	$ (2.00)	$ 2.64	$ (0.06)	$ 2.47
Weighted average number of common shares:
Basic									18,977,263	18,219,343	17,601,956
Diluted									19,390,413	18,219,343	17,913,545
Other comprehensive income (loss), before tax:
Translation adjustment									480	(3,192)	(1,710)
Unrealized gain (loss) on derivative instrument									416	(693)	(126)
Other comprehensive income (loss), before tax									896	(3,885)	(1,836)
Income tax (expense) benefit related to components of other comprehensive income	(153)				256				(153)	256	36
Other comprehensive income (loss), net of tax									743	(3,629)	(1,800)
Comprehensive income (loss)									52,038	(4,702)	42,408
Adjustments [Member]
Product sales									(14,811)	(27,828)	2,062
Marketing service fees									72	(322)	(120)
Net Sales	5,330	(6,895)	(6,069)	(7,105)	(4,446)	(5,796)	(8,454)	(9,454)	(14,739)	(28,150)	1,942
Cost of sales	6,440	2,011	3,871	(561)	4,061	(728)	(431)	6	11,761	2,908	6,632
Gross profit	(1,110)	(8,906)	(9,940)	(6,544)	(8,507)	(5,068)	(8,023)	(9,460)	(26,500)	(31,058)	(4,690)
Operating expenses
Sales and marketing									(13,212)	(6,634)	(4,722)
General and administrative									(436)	107	98
Amortization of intangible assets									200	200	200
Charges related to U.S. Government resolutions (Note 17)									(678)	678
Total operating expenses	(2,242)	(6,178)	(3,673)	(2,033)	(870)	(2,436)	(986)	(1,357)	(14,126)	(5,649)	(4,424)
Operating income	1,132	(2,728)	(6,267)	(4,511)	(7,637)	(2,632)	(7,037)	(8,103)	(12,374)	(25,409)	(266)
Other income and (expense)
Interest expense, net									(166)	3,915	4,930
Total other income (expense)									(166)	3,915	4,930
Income (loss) before income taxes									(12,540)	(21,494)	4,664
Income tax (expense) benefit									3,654	7,016	(1,425)
Net income (loss) from continuing operations, net of tax	1,373	(2,544)	(4,097)	(3,618)	(3,878)	(1,651)	(3,940)	(5,009)	(8,886)	(14,478)	3,239
Discontinued operations (Note 16)
Gain on sale of Breg, Inc., net of tax
Gain on sale of vascular operations, net of tax (Note 22)											(3,498)
Income (loss) from discontinued operations									1,018	(3,968)	(4,926)
Income tax benefit (expense)									(589)	1,409	5,273
Net income (loss) from discontinued operations, net of tax	(726)		146	1,009	(627)	(652)	(623)	(657)	429	(2,559)	(3,151)
Net income (loss)									(8,457)	(17,037)	88
Net income (loss) per common share-basic:
Net income (loss) from continuing operations, net of tax	$ 0.07	$ (0.14)	$ (0.22)	$ (0.19)	$ (0.20)	$ (0.09)	$ (0.22)	$ (0.28)	$ (0.47)	$ (0.79)	$ 0.18
Net income (loss) from discontinued operations, net of tax	$ (0.03)		$ 0.01	$ 0.05	$ (0.04)	$ (0.04)	$ (0.04)	$ (0.03)	$ 0.02	$ (0.14)	$ (0.17)
Net income (loss) per common share-basic	$ 0.04	$ (0.14)	$ (0.21)	$ (0.14)	$ (0.24)	$ (0.13)	$ (0.26)	$ (0.31)	$ (0.45)	$ (0.93)	$ 0.01
Net income (loss) per common share-diluted:
Net income (loss) from continuing operations, net of tax	$ 0.07	$ (0.13)	$ (0.22)	$ (0.19)	$ (0.21)	$ (0.09)	$ (0.22)	$ (0.28)	$ (0.46)	$ (0.79)	$ 0.18
Net income (loss) from discontinued operations, net of tax	$ (0.04)	$ (0.01)	$ 0.01	$ 0.05	$ (0.03)	$ (0.03)	$ (0.03)	$ (0.03)	$ 0.03	$ (0.14)	$ (0.18)
Net income (loss) per common share-diluted:	$ (0.03)	$ (0.14)	$ (0.21)	$ (0.14)	$ (0.24)	$ (0.12)	$ (0.25)	$ (0.31)	$ (0.43)	$ (0.93)
Other comprehensive income (loss), before tax:
Translation adjustment									288	913	393
Other comprehensive income (loss), before tax									288	913	393
Other comprehensive income (loss), net of tax									288	913	393
Comprehensive income (loss)									$ (8,169)	$ (16,124)	$ 481