Segment Reporting (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment information about the reported product revenues and operating income
Product revenues	$ 136,153	$ 77,137	$ 265,679	$ 112,933
Depreciation and amortization	7,826	5,704	15,402	6,094
Operating income (loss)	8,862	4,024	17,579	4,893
CCS [Member]
Segment information about the reported product revenues and operating income
Product revenues	33,153	31,696	62,151	67,247
Depreciation and amortization	317	233	608	469
Operating income (loss)	8,756	7,851	15,738	17,410
Advanced Technology [Member]
Segment information about the reported product revenues and operating income
Product revenues		264		509
Depreciation and amortization	133	142	266	285
Operating income (loss)	(1,572)	(1,453)	(3,130)	(3,025)
W.E.T. [Member]
Segment information about the reported product revenues and operating income
Product revenues	103,000	45,177	203,528	45,177
Depreciation and amortization	7,115	5,060	14,005	5,060
Operating income (loss)	6,703	2,160	14,025	2,160
Reconciling Items [Member]
Segment information about the reported product revenues and operating income
Product revenues
Depreciation and amortization	261	269	523	280
Operating income (loss)	$ (5,025)	$ (4,534)	$ (9,054)	$ (11,652)