Summary of Significant Accounting Policies - Components Of Other Assets (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Accounting Policies [Abstract]
Retirement benefit assets	$ 3,336	$ 4,247
Deferred compensation benefits	28,488	27,828
Investments	28,351	29,139
Cash surrender value of life insurance policies	105,213	105,227
Customer sales returns inventories	72,814	67,400
Guarantees related to borrowings	35,000	29,000
Other long-term prepayments and receivables	187,716	188,849
Total other assets	$ 460,918	$ 451,690