Consolidated Condensed Balance Sheets (unaudited) (Parenthetical) - $ / shares	Sep. 30, 2015	Dec. 31, 2014
Stockholders’ Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	400,000,000	400,000,000
Common stock, shares issued (in shares)	263,111,472	263,111,472
Treasury common stock at cost (in shares)	72,298,711	68,139,027