Schedule II VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Allowance for doubtful accounts
Change in valuation and qualifying accounts
Balance at Beginning of Period	$ 86	$ 131
Charges to Earnings	406	55
Deductions	(11)	(100)
Balance at End of Period	503	86
Deferred tax valuation allowance
Change in valuation and qualifying accounts
Balance at Beginning of Period	68,138	52,285
Charges to Earnings	(13,176)	15,853
Balance at End of Period	$ 54,961	$ 68,138