SCHEDULE II - CONSOLIDATED VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Activity in valuation and qualifying accounts
Balance at Beginning of Year	$ 28,757	$ 22,989	$ 3,722
Charged (Credited) to Costs and Expenses	(79)	5,768	19,288
Deductions (Recovery)	(674)		(21)
Balance at End of Year	28,004	28,757	22,989
Allowance for doubtful accounts
Activity in valuation and qualifying accounts
Balance at Beginning of Year		557	402
Charged (Credited) to Costs and Expenses		82	155
Balance at End of Year	639	639	557
Allowance for sales returns and adjustments
Activity in valuation and qualifying accounts
Balance at Beginning of Year	79	337	75
Charged (Credited) to Costs and Expenses	(79)	(258)	262
Balance at End of Year		79	337
Income tax valuation allowance
Activity in valuation and qualifying accounts
Balance at Beginning of Year	28,039	22,095	3,245
Charged (Credited) to Costs and Expenses		5,944	18,871
Deductions (Recovery)	(674)		(21)
Balance at End of Year	27,365	28,039	22,095
Income tax valuation allowance | As reported
Activity in valuation and qualifying accounts
Balance at Beginning of Year	32,100	28,500
Charged (Credited) to Costs and Expenses		3,600	25,300
Deductions (Recovery)	(2,900)
Balance at End of Year	$ 29,100	$ 32,100	$ 28,500