Acquisitions - Additional Information (Detail)	6 Months Ended		1 Months Ended		1 Months Ended			1 Months Ended			1 Months Ended		1 Months Ended
	Jun. 30, 2012 USD ($)	Dec. 31, 2011 USD ($)	Jan. 31, 2011 At Films USD ($)	Feb. 29, 2012 At Films USD ($)	Apr. 30, 2012 Precision Photonics Corporation USD ($)	Jun. 30, 2012 Precision Photonics Corporation USD ($)	Apr. 11, 2012 Precision Photonics Corporation USD ($)	Apr. 30, 2012 Erc USD ($)	Apr. 30, 2012 Erc JPY (¥)	Jun. 30, 2012 Erc USD ($)	Mar. 31, 2011 Microfluidics USD ($)	Mar. 11, 2011 Microfluidics USD ($)	Jun. 30, 2011 Cvi Mg USD ($)	Jun. 10, 2011 Cvi Mg USD ($)
Business Acquisition [Line Items]
Annual revenue of entity acquired					$ 7,000,000			$ 27,000,000	¥ 2,140,000,000
Aggregate purchase price			34,500,000				20,600,000	18,300,000	1,470,000,000			18,500,000		394,700,000
Goodwill recognized in acquisition	25,849		18,200,000			15,012	15,000,000	10,800,000		10,837		5,900,000		208,500,000
Intangible assets recognized in acquisition			11,400,000				5,100,000	5,600,000				9,700,000		115,800,000
Goodwill not deductible for tax purpose							15,000,000	10,800,000				5,900,000
Acquisition cash payment made for funded from operation							20,600,000
Purchase price paid (in cash)			31,800,000					13,600,000						393,300,000
Purchase price funded through debt								4,700,000						1,400,000
Acquisition-related transaction costs	1,800,000
Annual revenue of entity acquired			9,000,000								16,000,000		178,000,000
Contingent consideration value as of opening balance sheet date			2,700,000
Contingent consideration paid	1,500,000	3,000,000		1,500,000
Contingent consideration yet to be paid accounted as accrued liabilities	124,167,000	130,696,000		1,500,000
Goodwill deductible for tax purpose			18,200,000											117,700,000
Purchase price financed with borrowings under revolving credit facility													$ 365,000,000