Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012	Mar. 18, 2013 FTL Seals Technology, Ltd
Schedule of Business Acquisitions, Cost of Acquired Entity [Line Items]
Accounts receivable			$ 3,454
Inventory			4,524
Other current assets, net of cash acquired			131
Property, plant and equipment			1,357
Goodwill	1,329,797	1,321,727	17,994
Intangible assets			13,016
Total assets acquired			40,476
Total liabilities assumed			(5,939)
Net assets acquired			$ 34,537