Significant Accounting Policies (Reconciliation of Weighted Average Shares Table) (Details 2) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Weighted average shares used in the basic and diluted net income per common share
Basic weighted average common shares outstanding	348,802	348,962	366,659
Potentially dilutive securities:
Restricted stock, stock options, SARs and performance-based equity awards	0	2,205	3,218
Diluted weighted average common shares outstanding	348,802	351,167	369,877