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Supplemental Guarantor Condensed Consolidating Financial Statements - Schedule of Supplemental Condensed Consolidating Statement of Operations (Detail) (USD $)
 3 Months Ended 6 Months Ended
Mar. 30, 2013
Mar. 24, 2012
Mar. 24, 2011
Mar. 30, 2013
Mar. 24, 2012
Revenues:          
Product sales $ 518,014,000 $ 388,085,000   $ 1,053,216,000 $ 780,181,000
Service and other revenues 94,649,000 83,080,000   190,809,000 163,695,000
Total revenues 612,663,000 471,165,000   1,244,025,000 943,876,000
Costs and expenses:          
Cost of product sales 208,278,000 154,423,000   431,771,000 286,367,000
Cost of product sales - amortization of intangible assets 75,733,000 44,341,000   151,020,000 90,512,000
Cost of service and other revenues 49,326,000 46,291,000   100,235,000 91,517,000
Research and development 49,621,000 29,297,000   101,130,000 57,639,000
Selling and marketing 88,614,000 78,539,000   183,057,000 155,999,000
General and administrative 64,233,000 41,843,000   118,624,000 88,338,000
Amortization of intangible assets 28,667,000 16,629,000   57,193,000 31,471,000
Contingent consideration - compensation expense 29,388,000 18,121,000   58,874,000 28,562,000
Contingent consideration - fair value adjustments 799,000 43,188,000   10,839,000 48,310,000
Gain on sale of intellectual property, net   (12,424,000) (84,500,000) (53,884,000) (12,424,000)
Non-recurring charges         (91,000)
Restructuring and divestiture net charges 12,462,000 783,000   16,395,000 692,000
Costs and expenses, total 607,121,000 461,031,000   1,175,254,000 866,983,000
Income (loss) from operations 5,542,000 10,134,000   68,771,000 76,893,000
Interest income 207,000 590,000   467,000 1,252,000
Interest expense (76,049,000) (28,512,000)   (148,130,000) (58,021,000)
Debt extinguishment loss (3,247,000) (42,347,000)   (3,247,000) (42,347,000)
Other (expense) income, net (201,000) 1,527,000   1,038,000 3,519,000
(Loss) income before income taxes (73,748,000) (58,608,000)   (81,101,000) (18,704,000)
(Benefit) provision for income taxes (22,644,000) (18,335,000)   (33,115,000) 757,000
Net (loss) income (51,104,000) (40,273,000)   (47,986,000) (19,461,000)
Parent Company [Member]
          
Revenues:          
Product sales 100,614,000 105,485,000   198,657,000 211,246,000
Service and other revenues 81,176,000 74,836,000   159,136,000 148,264,000
Total revenues 181,790,000 180,321,000   357,793,000 359,510,000
Costs and expenses:          
Cost of product sales 52,488,000 53,947,000   106,008,000 107,637,000
Cost of product sales - amortization of intangible assets 1,309,000 1,304,000   2,615,000 2,609,000
Cost of service and other revenues 40,620,000 38,474,000   78,998,000 77,709,000
Research and development 7,234,000 6,553,000   14,652,000 13,797,000
Selling and marketing 20,484,000 15,686,000   41,257,000 32,183,000
General and administrative 16,716,000 12,110,000   32,036,000 25,130,000
Amortization of intangible assets 777,000 677,000   1,455,000 1,354,000
Contingent consideration - compensation expense 29,388,000 18,121,000   58,874,000 28,562,000
Contingent consideration - fair value adjustments 799,000 43,188,000   10,839,000 48,310,000
Restructuring and divestiture net charges 164,000     385,000  
Costs and expenses, total 169,979,000 190,060,000   347,119,000 337,291,000
Income (loss) from operations 11,811,000 (9,739,000)   10,674,000 22,219,000
Interest income 99,000 463,000   230,000 1,041,000
Interest expense (75,238,000) (27,662,000)   (146,492,000) (56,371,000)
Debt extinguishment loss (3,247,000) (42,347,000)   (3,247,000) (42,347,000)
Other (expense) income, net 1,638,000 1,418,000   1,757,000 2,882,000
(Loss) income before income taxes (64,937,000) (77,867,000)   (137,078,000) (72,576,000)
(Benefit) provision for income taxes (14,842,000) (31,518,000)   (26,589,000) (25,309,000)
Equity in earnings (losses) of subsidiaries (1,009,000) 6,076,000   62,503,000 27,806,000
Net (loss) income (51,104,000) (40,273,000)   (47,986,000) (19,461,000)
Guarantor Subsidiaries [Member]
          
Revenues:          
Product sales 398,811,000 248,435,000   778,582,000 498,883,000
Service and other revenues 19,422,000 15,122,000   40,563,000 29,648,000
Total revenues 418,233,000 263,557,000   819,145,000 528,531,000
Costs and expenses:          
Cost of product sales 170,310,000 94,789,000   334,205,000 175,510,000
Cost of product sales - amortization of intangible assets 73,374,000 42,911,000   146,291,000 85,821,000
Cost of service and other revenues 15,777,000 14,487,000   31,368,000 28,217,000
Research and development 39,973,000 19,385,000   81,726,000 37,515,000
Selling and marketing 45,237,000 42,509,000   92,602,000 84,755,000
General and administrative 38,631,000 22,087,000   69,647,000 46,277,000
Amortization of intangible assets 26,687,000 13,860,000   53,336,000 27,719,000
Gain on sale of intellectual property, net   (12,424,000)   (53,884,000) (12,424,000)
Restructuring and divestiture net charges 10,600,000 196,000   13,886,000 196,000
Costs and expenses, total 420,589,000 237,800,000   769,177,000 473,586,000
Income (loss) from operations (2,356,000) 25,757,000   49,968,000 54,945,000
Interest income 36,000 31,000   78,000 77,000
Interest expense (309,000) (360,000)   (623,000) (687,000)
Other (expense) income, net (3,073,000) 48,000   (7,119,000) 69,000
(Loss) income before income taxes (5,702,000) 25,476,000   42,304,000 54,404,000
(Benefit) provision for income taxes (8,081,000) 15,067,000   (11,195,000) 23,638,000
Equity in earnings (losses) of subsidiaries 2,459,000 2,403,000   13,393,000 5,793,000
Net (loss) income 4,838,000 12,812,000   66,892,000 36,559,000
Non-Guarantor Subsidiaries [Member]
          
Revenues:          
Product sales 121,340,000 103,727,000   254,415,000 206,261,000
Service and other revenues 9,535,000 7,105,000   19,407,000 14,367,000
Total revenues 130,875,000 110,832,000   273,822,000 220,628,000
Costs and expenses:          
Cost of product sales 88,231,000 75,249,000   169,996,000 139,429,000
Cost of product sales - amortization of intangible assets 1,050,000 126,000   2,114,000 2,082,000
Cost of service and other revenues 8,413,000 7,313,000   18,166,000 14,175,000
Research and development 2,414,000 3,359,000   4,752,000 6,327,000
Selling and marketing 22,893,000 20,344,000   49,198,000 39,061,000
General and administrative 8,886,000 7,646,000   16,941,000 16,931,000
Amortization of intangible assets 1,203,000 2,092,000   2,402,000 2,398,000
Non-recurring charges         (91,000)
Restructuring and divestiture net charges 3,092,000 587,000   3,518,000 587,000
Costs and expenses, total 136,182,000 116,716,000   267,087,000 220,899,000
Income (loss) from operations (5,307,000) (5,884,000)   6,735,000 (271,000)
Interest income 72,000 96,000   159,000 134,000
Interest expense (502,000) (490,000)   (1,015,000) (963,000)
Other (expense) income, net 1,247,000 61,000   6,427,000 568,000
(Loss) income before income taxes (4,490,000) (6,217,000)   12,306,000 (532,000)
(Benefit) provision for income taxes 279,000 (1,884,000)   4,669,000 2,428,000
Equity in earnings (losses) of subsidiaries         557,000
Net (loss) income (4,769,000) (4,333,000)   7,637,000 (2,403,000)
Eliminations [Member]
          
Revenues:          
Product sales (102,751,000) (69,562,000)   (178,438,000) (136,209,000)
Service and other revenues (15,484,000) (13,983,000)   (28,297,000) (28,584,000)
Total revenues (118,235,000) (83,545,000)   (206,735,000) (164,793,000)
Costs and expenses:          
Cost of product sales (102,751,000) (69,562,000)   (178,438,000) (136,209,000)
Cost of service and other revenues (15,484,000) (13,983,000)   (28,297,000) (28,584,000)
Restructuring and divestiture net charges (1,394,000)     (1,394,000)  
Costs and expenses, total (119,629,000) (83,545,000)   (208,129,000) (164,793,000)
Income (loss) from operations 1,394,000     1,394,000  
Other (expense) income, net (13,000)     (27,000)  
(Loss) income before income taxes 1,381,000     1,367,000  
Equity in earnings (losses) of subsidiaries (1,450,000) (8,479,000)   (75,896,000) (34,156,000)
Net (loss) income $ (69,000) $ (8,479,000)   $ (74,529,000) $ (34,156,000)