Schedule II-Consolidated Valuation and Qualifying Accounts (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Allowance for doubtful accounts [Member]
Consolidated Valuation and Qualifying Accounts
Balance at Beginning of Period	$ 3,926	$ 5,099	$ 5,105
Charged/(Credited) to Expense	1,042	894	2,924
Other Adjustments	95	533	1,153
Deductions	(667)	(2,600)	(4,083)
Balance at End of Period	4,396	3,926	5,099
Deferred tax valuation allowance [Member]
Consolidated Valuation and Qualifying Accounts
Balance at Beginning of Period	148,364	142,561	143,175
Charged/(Credited) to Expense	(2,894)	5,803	(614)
Balance at End of Period	$ 145,470	$ 148,364	$ 142,561