Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity [Abstract]

Shares of common stock reserved for future issuance

At December 31, 2011, the Company had reserved shares of common stock for future issuance as follows:

Common stock options outstanding	384,000
Restricted stock units outstanding	891,000
2007 Stock Incentive Program - available to grant	1,534,000
Phantom stock units outstanding	87,000
Phantom stock units available to grant	95,000
Common stock warrants	8,823,529
Exchangeable unsecured notes, due 2102	6,176,471
Convertible senior debentures, due 2040*	22,285,258
Convertible senior debentures, due 2041*	8,870,490
Conversion of Class B common stock	13,452,549
	62,599,297