Quarterly Data (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2013		Sep. 30, 2013		Jun. 30, 2013		Mar. 31, 2013		Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Schedule Of Quarterly Financial Information [Line Items]
Net revenues	$ 450,539		$ 413,796		$ 420,059		$ 411,877	[1]	$ 419,056	[2]	$ 368,054	[2]	$ 383,332	[2]	$ 380,567	[1],[2]	$ 1,696,271	$ 1,551,009	$ 1,492,528
Gross profit	224,943		203,992		209,490		200,520	[1]	199,180	[2]	180,567	[2]	184,364	[2]	184,114	[1],[2]	838,945	748,225	708,778
Income (loss) from continuing operations before interest, loss on extinguishments of debt and taxes	54,064		66,042		63,751		49,404	[1]	58,440	[2]	49,841	[2]	64,722	[2]	(270,378)	[1],[2]	233,261	(97,375)	229,570
Income (loss) from continuing operations	35,302		45,779		43,401		27,701	[1]	30,614	[2]	24,451	[2]	47,266	[2]	(284,113)	[1],[2]	152,183	(181,782)	119,322
Income (loss) from discontinued operations	(236)		1,029		(766)		(462)	[1]	(1,037)	[2]	(2,521)	[2]	(4,367)	[2]	605	[1],[2]	(435)	(7,320)	205,645
Net income (loss)	35,066		46,808		42,635		27,239	[1]	29,577	[2]	21,930	[2]	42,899	[2]	(283,508)	[1],[2]	151,748	(189,102)	324,967
Less: Income from continuing operations attributable to noncontrolling interest	238		234		194		201	[1]	254	[2]	188	[2]	286	[2]	227	[1],[2]	867	955	1,021
Net income (loss) attributable to common shareholders	$ 34,828		$ 46,574		$ 42,441		$ 27,038	[1]	$ 29,323	[2]	$ 21,742	[2]	$ 42,613	[2]	$ (283,735)	[1],[2]	$ 150,881	$ (190,057)	$ 323,329
Basic:
Income (loss) from continuing operations	$ 0.85	[3]	$ 1.11	[3]	$ 1.05	[3]	$ 0.67	[1],[3]	$ 0.74	[2],[3]	$ 0.59	[2],[3]	$ 1.15	[2],[3]	$ (6.97)	[1],[2],[3]	$ 3.68	$ (4.47)	$ 2.92
Income (loss) from discontinued operations			$ 0.02	[3]	$ (0.02)	[3]	$ (0.01)	[1],[3]	$ (0.02)	[2],[3]	$ (0.06)	[2],[3]	$ (0.11)	[2],[3]	$ 0.01	[1],[2],[3]	$ (0.01)	$ (0.18)	$ 5.06
Net income	$ 0.85	[3]	$ 1.13	[3]	$ 1.03	[3]	$ 0.66	[1],[3]	$ 0.72	[2],[3]	$ 0.53	[2],[3]	$ 1.04	[2],[3]	$ (6.96)	[1],[2],[3]	$ 3.67	$ (4.65)	$ 7.98
Diluted:
Income (loss) from continuing operations	$ 0.78	[3]	$ 1.05	[3]	$ 0.99	[3]	$ 0.64	[1],[3]	$ 0.72	[2],[3]	$ 0.58	[2],[3]	$ 1.14	[2],[3]	$ (6.97)	[1],[2],[3]	$ 3.46	$ (4.47)	$ 2.90
Income (loss) from discontinued operations	$ (0.01)	[3]	$ 0.03	[3]	$ (0.01)	[3]	$ (0.01)	[1],[3]	$ (0.02)	[2],[3]	$ (0.06)	[2],[3]	$ (0.10)	[2],[3]	$ 0.01	[1],[2],[3]	$ (0.01)	$ (0.18)	$ 5.02
Net income	$ 0.77	[3]	$ 1.08	[3]	$ 0.98	[3]	$ 0.63	[1],[3]	$ 0.70	[2],[3]	$ 0.52	[2],[3]	$ 1.04	[2],[3]	$ (6.96)	[1],[2],[3]	$ 3.45	$ (4.65)	$ 7.92

[1] Amounts for the first quarter 2012 include a pretax goodwill impairment charge of $332.1 million, or $315.1 million net of tax. See Note 7 to the consolidated financial statements.

[2] Amounts reflect the retrospective impact of reporting the orthopedic business as discontinued operations. See Note 18 to the consolidated financial statements.

[3] Each quarter is calculated as a discrete period; the sum of the four quarters may not equal the calculated full year amount.