Commitments and Contingencies (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Nov. 22, 2011
Commitments and Contingencies [Line Items]
Rent expense	$ 4,776,000	$ 4,201,000	$ 3,964,000
Tenant improvement reimbursement allowance		2,100,000
Minimum number of non-cancelable operating leases term for certain production equipment (in years)	4 years
Maximum number of non-cancelable operating leases term for certain production equipment (in years)	5 years
Outstanding obligation under all equipment operating leases	22,578,000
Year Ending:
2013	11,499,000
2014	10,172,000
2015	8,950,000
2016	5,778,000
2017	1,330,000
Thereafter	0
Total minimum lease payments	37,729,000
Company's purchase obligations	22,806,000
Line of Credit [Abstract]
Credit Agreement				5 years
Senior secured revolving credit facility	125,000,000
Potential increase in credit facility, maximum	75,000,000
Total credit facility	200,000,000
Maximum ratio of consolidated total indebtedness to EBITDA allowed to prevent default	2.75
Minimum ratio of consolidated EBITDA to fixed charges allowed to prevent default	2.50
Credit Facility origination costs		1,100,000
Line of Credit [Member] | Revolving Credit Facility [Member] | Adjusted LIBO Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	1.00%
Minimum [Member] | Line of Credit [Member] | Base Rate Loan [Member] | Eurodollar Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	0.50%
Minimum [Member] | Line of Credit [Member] | Adjusted LIBO Loan [Member] | Eurodollar Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	1.50%
Maximum [Member] | Line of Credit [Member] | Revolving Credit Facility [Member] | Federal Funds Effective Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	0.50%
Maximum [Member] | Line of Credit [Member] | Base Rate Loan [Member] | Eurodollar Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	1.25%
Maximum [Member] | Line of Credit [Member] | Adjusted LIBO Loan [Member] | Eurodollar Rate [Member]
Line of Credit [Abstract]
Debt instrument, basis spread on variable rate	2.25%
Building Construction-in-Progress [Member]
Year Ending:
Lease square footage	300,000
Property and equipment	4,900,000
Increase in property and equipment, additions	$ 1,500,000
Useful life (in years)	30 years