1. Basis of Presentation and Use of Estimates Immaterial Errors Related to Presentation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended			3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Sep. 30, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2011 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2010 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Sep. 30, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Sep. 30, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2011 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2010 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Sep. 30, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Sep. 30, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2011 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2010 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Sep. 30, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Sep. 30, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2011 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2010 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Sep. 30, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Sep. 30, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2012 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2011 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Dec. 31, 2010 Income Tax on Reclassification Adjustments For Net Holding (Gain) Loss [Member]	Sep. 30, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Sep. 30, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2012 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2011 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Dec. 31, 2010 Reclassification Adjustments For Net Holding (Gain) Loss Net Of Income Tax [Member]	Sep. 30, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Sep. 30, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2012 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2011 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Dec. 31, 2010 Income Tax On Net Unrealized Holding Gain (Loss) [Member]	Sep. 30, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Sep. 30, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2012 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2011 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Dec. 31, 2010 Net Unrealized Holding Gain (Loss) Net Of Income Tax [Member]	Sep. 30, 2013 Cost of goods sold, immaterial error [Member]	Sep. 30, 2013 Cost of goods sold, immaterial error [Member]	Dec. 31, 2012 Cost of goods sold, immaterial error [Member]	Dec. 31, 2011 Cost of goods sold, immaterial error [Member]	Dec. 31, 2010 Cost of goods sold, immaterial error [Member]	Sep. 30, 2013 Selling, General And Administrative Expense, Immaterial Error [Member]	Sep. 30, 2013 Selling, General And Administrative Expense, Immaterial Error [Member]	Dec. 31, 2012 Selling, General And Administrative Expense, Immaterial Error [Member]	Dec. 31, 2011 Selling, General And Administrative Expense, Immaterial Error [Member]	Dec. 31, 2010 Selling, General And Administrative Expense, Immaterial Error [Member]	Sep. 30, 2013 Research and development expense, reclassification [Member]	Sep. 30, 2013 Research and development expense, reclassification [Member]	Dec. 31, 2012 Research and development expense, reclassification [Member]	Dec. 31, 2011 Research and development expense, reclassification [Member]	Dec. 31, 2010 Research and development expense, reclassification [Member]	Sep. 30, 2013 Provision for income taxes [Member]	Sep. 30, 2013 Provision for income taxes [Member]	Dec. 31, 2012 Provision for income taxes [Member]	Dec. 31, 2011 Provision for income taxes [Member]	Dec. 31, 2010 Provision for income taxes [Member]
Quantifying Misstatement in Current Year Financial Statements [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	$ 12,240	$ 30,405	$ 38,108	$ 7,373	$ 9,022	$ (719)	$ (4,973)	$ (5,045)	$ 104	$ (385)	$ (418)	$ (2,895)	$ (2,937)	$ 61	$ (224)	$ 21,023	$ 52,219	$ 65,448	$ 12,663	$ 15,495	$ (836)	$ (5,790)	$ (5,874)	$ 121	$ (448)	$ (1,438)	$ (9,946)	$ (10,090)	$ 208	$ (770)	$ (836)	$ (5,790)	$ (5,874)	$ 121	$ (448)	$ (1,438)	$ (9,946)	$ (10,090)	$ 208	$ (770)	$ 224,927	$ 654,784	$ 914,077	$ 894,700	$ 835,310	$ 160,134	$ 492,913	$ 681,778	$ 695,984	$ 634,413	$ 47,795	$ 150,637	$ 209,204	$ 177,604	$ 166,486	$ 12,383	$ 48,375	$ 64,729	$ 67,034	$ 39,533