Acquisitions - Schedule of Cost of Acquisition, including Fair Value of Contingent Consideration Allocated to Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Jun. 10, 2015	Jun. 01, 2015	Apr. 08, 2015	Feb. 26, 2015	Feb. 01, 2015	Dec. 30, 2014
Business Acquisition [Line Items]
Goodwill	$ 1,348,761	$ 1,287,180
Southern Vision Systems Inc [Member]
Business Acquisition [Line Items]
Cash and cash equivalents			$ 2,134
Accounts receivable			1,510
Inventories			911
Other current assets			50
Current assets			4,605
Property, plant and equipment			177
Goodwill			13,217
Intangibles			8,360
Total assets			26,359
Accounts payable			513
Accrued liabilities			494
Total current liabilities			1,007
Other non-current liabilities			3,351
Total liabilities			4,358
Net assets			$ 22,001
Bang & Olufsen Automotive Assets [Member]
Business Acquisition [Line Items]
Accounts receivable				$ 9,338
Inventories				5,699
Other current assets				1,562
Current assets				16,599
Property, plant and equipment				7,065
Goodwill				12,769
Intangibles				129,700
Total assets				166,133
Accrued liabilities				960
Total current liabilities				960
Total liabilities				960
Net assets				$ 165,173
Symphony Teleca Corporation [Member]
Business Acquisition [Line Items]
Cash and cash equivalents					$ 47,023
Accounts receivable					51,553
Other current assets					74,095
Current assets					172,671
Property, plant and equipment					24,954
Goodwill					602,466
Intangibles					202,900
Other assets					33,479
Total assets					1,036,470
Short-term debt					13,417
Accounts payable					4,469
Accrued liabilities					47,437
Total current liabilities					65,323
Long-term debt					120,847
Other non-current liabilities					87,166
Total liabilities					273,336
Non-controlling interest					17,461
Total liabilities and equity					290,797
Net assets					$ 745,673
Red Bend Ltd. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents						$ 2,401
Accounts receivable						2,007
Other current assets						1,245
Current assets						5,653
Property, plant and equipment						1,261
Goodwill						187,131
Intangibles						50,300
Other assets						4,934
Total assets						249,279
Short-term debt						1,715
Accounts payable						833
Accrued liabilities						15,827
Total current liabilities						18,375
Other non-current liabilities						18,877
Total liabilities						37,252
Net assets						$ 212,027
S1nn GmbH & Co. KG [Member]
Business Acquisition [Line Items]
Cash and cash equivalents							$ 9,497
Accounts receivable							10,772
Inventories							2,975
Other current assets							4,287
Current assets							27,531
Property, plant and equipment							2,627
Goodwill							20,337
Intangibles							25,903
Other assets							3,211
Total assets							79,609
Accounts payable							7,958
Accrued liabilities							15,302
Total current liabilities							23,260
Other non-current liabilities							933
Total liabilities							24,193
Net assets							$ 55,416
IPSG/VFX [Member]
Business Acquisition [Line Items]
Goodwill								$ 3,640
Intangibles								1,781
Total assets								5,421
Other non-current liabilities								456
Total liabilities								456
Net assets								$ 4,965