Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (Fair Value, Measurements, Recurring [Member], USD $) In Thousands, unless otherwise specified	Sep. 28, 2013	Sep. 29, 2012
Assets:
Total assets	$ 17,820	$ 18,154
Liabilities:
Total liabilities	4,165	206
Derivative liabilities [Member]
Liabilities:
Total liabilities	0	206
Liability for contingent consideration [Member]
Liabilities:
Total liabilities	4,165
Certificates of deposit [Member]
Assets:
Total assets	17,820	17,820
Derivative assets [Member]
Assets:
Total assets		334
Level 1 [Member]
Assets:
Total assets	0	0
Liabilities:
Total liabilities	0	0
Level 1 [Member] | Derivative liabilities [Member]
Liabilities:
Total liabilities	0	0
Level 1 [Member] | Certificates of deposit [Member]
Assets:
Total assets	0	0
Level 1 [Member] | Derivative assets [Member]
Assets:
Total assets		0
Level 2 [Member]
Assets:
Total assets	17,820	18,154
Liabilities:
Total liabilities	0	206
Level 2 [Member] | Derivative liabilities [Member]
Liabilities:
Total liabilities	0	206
Level 2 [Member] | Certificates of deposit [Member]
Assets:
Total assets	17,820	17,820
Level 2 [Member] | Derivative assets [Member]
Assets:
Total assets		334
Level 3 [Member]
Assets:
Total assets	0	0
Liabilities:
Total liabilities	4,165	0
Level 3 [Member] | Derivative liabilities [Member]
Liabilities:
Total liabilities	0	0
Level 3 [Member] | Liability for contingent consideration [Member]
Liabilities:
Total liabilities	4,165
Level 3 [Member] | Certificates of deposit [Member]
Assets:
Total assets	0	0
Level 3 [Member] | Derivative assets [Member]
Assets:
Total assets		$ 0