Long-Term Incentive Plan (Details 1) (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Summary of option activity under long-term incentive plan
Number of Options Outstanding, Beginning balance	7,265	9,566	10,639
Weighted Average Exercise Price Outstanding, Beginning balance (in Dollars per share)	$ 16.06	$ 15.50	$ 15.69
Granted	0	0	609
Granted (in Dollars per share)			$ 7.09
Exercised	(225)	(162)	(56)
Exercised (in Dollars per share)	$ 1.88	$ 1.85	$ 1.76
Canceled	(1,506)	(2,139)	(1,626)
Canceled (in Dollars per share)	$ 17.13	$ 14.66	$ 14.07
Number of Options Outstanding, Ending balance, shares	5,534	7,265	9,566
Weighted Average Exercise Price Outstanding, Ending balance (in Dollars per share)	$ 16.34	$ 16.06	$ 15.50
Vested and exercisable December 31	5,366	6,897	8,756
Vested and exercisable December 31 (in Dollars per share)	$ 16.63	$ 16.55	$ 16.58
Weighted average remaining contractual term (in years)	3 years	4 years 6 months	3 years 9 months 18 days