Product Warranties (Details) (USD $)	3 Months Ended	12 Months Ended				3 Months Ended
	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Cost of Sales [Member]	Jun. 30, 2012 Material Customer [Member]
Product Liability Contingency [Line Items]
Maximum product warranty term		3 years
Reimbursements from suppliers					$ 1,200,000
Warranty accrual		2,965,000	4,455,000	6,871,000
Estimated product warranty liability		300,000
Reimbursement receivable		1,200,000
Period of product rebates/price concessions under settlement agreement		39 months
Movement in Standard Product Warranty Accrual [Roll Forward]
Balance, beginning of period	4,455,000	4,455,000	6,871,000	982,000
Charges to operations		1,350,000	2,116,000	8,244,000
Deductions for costs incurred		(2,840,000)	(4,532,000)	(2,355,000)		(2,000,000)
Balance, end of period		2,965,000	4,455,000	6,871,000
Decrease in warrant accrual due to more favorable rates with a third-party service provider	$ 800,000