Quarterly report pursuant to Section 13 or 15(d)

Per Share Data - Computations of Basic and Diluted Per Share (Details)

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Per Share Data - Computations of Basic and Diluted Per Share (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Earnings Per Share [Abstract]        
Basic weighted-average shares 180,674,937 184,743,052 181,019,191 184,870,096
Effect of dilutive securities:        
Options to purchase common stock (in shares) 0 0 0 0
Warrants to purchase common stock (in shares) 0 0 0 0
Dilutive potential common shares 0 0 0 0
Weighted average common shares outstanding and dilutive potential common shares 180,674,937 184,743,052 181,019,191 184,870,096