Earnings Per Common Share (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Earnings Per Share [Line Items]
Basic, weighted average shares outstanding	212,053,000	211,337,000	211,931,000	182,898,000
Effect of common stock equivalents under incentive plans	23,000	637,000		952,000
Diluted weighted average shares outstanding	212,076,000	211,974,000	211,931,000	183,850,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	5,800,000	3,000,000	5,000,000	2,100,000