Valuation and Qualifying Accounts (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance for obsolete inventory
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 17,357	$ 15,943	$ 16,210
Additions Charged to Costs and Expenses	9,966	6,258	4,611
Additions Through Acquisition	2,423	15	725
Other Changes Add (Deduct)	(8,143)	(4,859)	(5,603)
Balance at End of Period	21,603	17,357	15,943
Allowance for doubtful accounts receivable
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	4,268	4,473	6,369
Additions Charged to Costs and Expenses	75	375	25
Additions Through Acquisition	2,192	365	532
Other Changes Add (Deduct)	(640)	(945)	(2,453)
Balance at End of Period	$ 5,895	$ 4,268	$ 4,473