Segment Information about Reported Product Revenues and Operating Income (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Segment Reporting Information [Line Items]
Product revenues	$ 662,082	$ 554,979	$ 369,588
Depreciation and amortization	31,249	30,627	23,282
Operating income (loss)	49,580	36,058	17,808
CCS
Segment Reporting Information [Line Items]
Product revenues	143,250	132,265	131,732
Depreciation and amortization	1,411	1,215	1,032
Operating income (loss)	40,530	11,479	33,025
Advanced Technology
Segment Reporting Information [Line Items]
Product revenues			608
Depreciation and amortization	427	478	560
Operating income (loss)	(6,561)	(6,571)	(6,872)
W.E.T
Segment Reporting Information [Line Items]
Product revenues	518,832	422,714	237,248
Depreciation and amortization	28,238	27,747	20,900
Operating income (loss)	41,784	50,980	10,866
Reconciling Items
Segment Reporting Information [Line Items]
Depreciation and amortization	1,173	1,187	790
Operating income (loss)	$ (26,173)	$ (19,830)	$ (19,211)