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4. Intangible Assets, Goodwill and Other Intangible Assets (Details) (USD $)
 3 Months Ended 6 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2012
Jun. 30, 2011
Jun. 30, 2012
Jun. 30, 2011
Dec. 31, 2011
Jun. 30, 2012
Customer Relationships [Member]
Dec. 31, 2011
Customer Relationships [Member]
Jun. 30, 2012
Know how [Member]
Dec. 31, 2011
Know how [Member]
Jun. 30, 2012
Developed Technology Rights [Member]
Dec. 31, 2011
Developed Technology Rights [Member]
Jun. 30, 2012
Licensing Agreements [Member]
Dec. 31, 2011
Licensing Agreements [Member]
Jun. 30, 2012
Trade Names [Member]
Dec. 31, 2011
Trade Names [Member]
Jun. 30, 2012
Noncompete Agreements [Member]
Dec. 31, 2011
Noncompete Agreements [Member]
Jun. 30, 2012
Patents [Member]
Dec. 31, 2011
Patents [Member]
Jun. 30, 2012
Other Intangible Assets [Member]
Dec. 31, 2011
Other Intangible Assets [Member]
Jan. 18, 2012
Portland [Member]
Acquired Finite-Lived Intangible Assets [Line Items]                                            
Business Acquisition, Purchase Price Allocation, Goodwill Amount                                           $ 1,100,000
Business Acquisition, Purchase Price Allocation, Amortizable Intangible Assets                                           5,100,000
Finite-Lived Intangible Assets, Net [Abstract]                                            
Average Remaining Life (years)           1-12 1-12 1-14 1-14 1-10 1-11 1-8 1-9 1-10 1-10 1-7 1-7 0 0 0 0  
Purchase Price 406,500,000   406,500,000   405,300,000 96,900,000 98,700,000 185,900,000 187,000,000 52,200,000 47,600,000 35,500,000 35,600,000 29,100,000 29,500,000 5,800,000 5,800,000 1,000,000 1,000,000 100,000 100,000  
Accumulated Amortization (165,200,000)   (165,200,000)   (145,800,000) (34,200,000) (30,900,000) (55,100,000) (45,700,000) (27,000,000) (24,600,000) (17,200,000) (15,700,000) (24,900,000) (22,100,000) (5,700,000) (5,700,000) (1,000,000) (1,000,000) (100,000) (100,000)  
Net Carrying Amount 241,341,000   241,341,000   259,497,000 62,700,000 67,800,000 130,800,000 141,300,000 25,200,000 23,000,000 18,300,000 19,900,000 4,200,000 7,400,000 100,000 100,000 0 0 0 0  
Amortization [Abstract]                                            
Amortization expense $ 10,700,000 $ 9,300,000 $ 21,500,000 $ 18,100,000