Stock Incentive Plans - Non-Vested Stock Awards (Details) (USD $)	12 Months Ended
	Dec. 31, 2012
Stock Options and SARs
Non-Vested Stock Options and SARs:
Non-vested at January 1, 2012	1,773,272
Granted	428,804
Vested	(283,743)
Forfeitures	(97,997)
Non-vested at December 31, 2012	1,820,336
Weighted Average Grant Date Exercise Price Per Award:
Non-vested at January 1, 2012	$ 8.71
Granted	$ 1.62
Vested	$ 16.25
Forfeitures	$ 20.44
Non-vested at December 31, 2012	$ 5.23
Restricted Stock
Non-Vested Restricted Stock:
Non-vested at January 1, 2012	563,796
Granted	712,136
Vested	(711,273)
Forfeitures	(25,015)
Non-vested at December 31, 2012	539,644
Weighted Average Grant Date Fair Value Per Award:
Non-vested at January 1, 2012	$ 5.21
Granted	$ 1.01
Vested	$ 2.46
Forfeitures	$ 2.71
Non-vested at December 31, 2012	$ 3.41