Acquisitions - Schedule of Cost of Acquisition, including Fair Value of Contingent Consideration Allocated to Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Thousands	Mar. 31, 2016	Mar. 10, 2016	Jun. 30, 2015	Jun. 10, 2015	Jun. 01, 2015	Apr. 08, 2015	Feb. 26, 2015
Business Acquisition [Line Items]
Goodwill	$ 1,426,202		$ 1,287,180
TowerSec Ltd. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents		$ 793
Other current assets		89
Total current assets		882
Property, plant and equipment		209
Goodwill		60,936
Intangible assets		6,000
Total assets		68,027
Accounts payable		293
Accrued liabilities		373
Total current liabilities		666
Other non-current liabilities		4,162
Total liabilities		4,828
Net assets		$ 63,199
Southern Vision Systems Inc [Member]
Business Acquisition [Line Items]
Cash and cash equivalents				$ 2,134
Receivables				1,510
Inventories				855
Other current assets				50
Total current assets				4,549
Property, plant and equipment				177
Goodwill				13,244
Intangible assets				8,360
Total assets				26,330
Accounts payable				513
Accrued liabilities				464
Total current liabilities				977
Other non-current liabilities				3,351
Total liabilities				4,328
Net assets				$ 22,002
Bang & Olufsen Automotive Assets [Member]
Business Acquisition [Line Items]
Receivables					$ 9,338
Inventories					5,430
Other current assets					1,152
Total current assets					15,920
Property, plant and equipment					7,594
Goodwill					13,006
Intangible assets					129,700
Total assets					166,220
Accrued liabilities					1,047
Total current liabilities					1,047
Total liabilities					1,047
Net assets					$ 165,173
Symphony Teleca Corporation [Member]
Business Acquisition [Line Items]
Cash and cash equivalents						$ 47,023
Receivables						51,553
Other current assets						74,095
Total current assets						172,671
Property, plant and equipment						24,954
Goodwill						598,849
Intangible assets						202,900
Other assets						38,011
Total assets						1,037,385
Short-term debt						13,417
Accounts payable						4,469
Accrued liabilities						49,183
Total current liabilities						67,069
Long-term debt						120,847
Other non-current liabilities						87,167
Total liabilities						275,083
Non-controlling interest						17,461
Total liabilities and equity						292,544
Net assets						$ 744,841
Red Bend Ltd. [Member]
Business Acquisition [Line Items]
Cash and cash equivalents							$ 2,401
Receivables							2,007
Other current assets							1,245
Total current assets							5,653
Property, plant and equipment							1,261
Goodwill							205,907
Intangible assets							30,500
Other assets							4,933
Total assets							248,254
Short-term debt							1,715
Accounts payable							833
Accrued liabilities							15,826
Total current liabilities							18,374
Other non-current liabilities							13,630
Total liabilities							32,004
Net assets							$ 216,250