Other Long-Term Liabilities - Components of Other- Long Term Liabilities (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Other Liabilities Disclosure [Abstract]
Deferred Compensation Liability, Classified, Noncurrent	$ 24,238	$ 22,425
Supplemental executive retirement plan	11,337	10,197
Other	5,051	3,834
Total	$ 40,626	$ 36,456