Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Allowance for Doubtful Accounts
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 2,407	$ 2,491	$ 2,912
Additions Charged to Cost and Expenses			55
Deductions	51	84	476
Balance at End of Period	2,356	2,407	2,491
Inventory Reserve
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	119,376	111,252	115,857
Additions Charged to Cost and Expenses	17,493	21,332	22,193
Other	4,417	1,680	7,064
Deductions	25,270	14,888	33,862
Balance at End of Period	116,016	119,376	111,252
Valuation Allowance of Deferred Tax Assets
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	43,039	41,737	40,386
Additions Charged to Cost and Expenses	5,413	1,322	1,380
Deductions	83	20	29
Balance at End of Period	$ 48,369	$ 43,039	$ 41,737