Goodwill and Other Intangible Assets - Future Amortization Expense of Other Intangible Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	$ 9,049
2017	8,834
2018	8,664
2019	8,517
2020	8,373
Thereafter	67,184
Net Carrying Amount	110,621	$ 122,167
Structural Systems
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	1,123
2017	907
2018	737
2019	591
2020	490
Thereafter	1,019
Net Carrying Amount	4,867	6,254
Electronic Systems
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2016	7,926
2017	7,927
2018	7,927
2019	7,926
2020	7,883
Thereafter	66,165
Net Carrying Amount	$ 105,754	$ 115,913