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Subsequent Events	9 Months Ended
Subsequent Events	Sep. 30, 2015
Subsequent Events:
Subsequent Events:	14. Subsequent Events: On October 27, 2015, the company announced that the Board of Directors approved a quarterly dividend of $1.30 per common share. The dividend is payable December 10, 2015 to shareholders of record on November 10, 2015. On October 27, 2015, the company announced that the Board of Directors authorized $4.0 billion in additional funds for use in the company’s stock repurchase program.