SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Valuation and Qualifying Accounts Disclosure [Line Items]
Valuation allowance adjustment	$ 500,000		$ 4,200,000		$ 1,200,000
Allowance For Doubtful Accounts And Sales Returns And Allowances [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	6,978,000		7,322,000		11,216,000
Charged to Costs and Expenses	1,315,000		1,118,000		(2,167,000)
Charged to Other Accounts	0	[1]	0	[1]	0	[1]
Deductions	(1,072,000)		(1,462,000)		(1,727,000)
Balance at End of Period	7,221,000		6,978,000		7,322,000
Deferred Tax Asset Valuation Allowance [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	32,304,000		36,634,000		36,131,000
Charged to Costs and Expenses	(16,979,000)		127,000		431,000
Charged to Other Accounts	477,000	[1]	(4,238,000)	[1]	1,160,000	[1]
Deductions	(1,559,000)		(219,000)		(1,088,000)
Balance at End of Period	$ 14,243,000		$ 32,304,000		$ 36,634,000

[1] In 2012, $0.5 million of deferred tax liability was reclassified to the valuation allowance with no impact to the consolidated statement of operations. In 2011, $4.2 million of the valuation allowance was reclassified to long-term taxes payable with no impact to the consolidated statements of operations. In 2010, $1.2 million of deferred tax liability was reclassified to the valuation allowance with no impact to the consolidated statement of operations.