EXHIBIT 11 COMPUTATION OF PER SHARE EARNINGS THREE MONTHS ENDED MARCH 31, ---------------------- 1998 1997 ---- ---- Net Income ($000) $26,719 $9,618 Weighted Average Common Shares Outstanding 69,227,528 69,240,938 Basic Earnings Per Share $0.39 $0.14 Weighted Average Common Shares Outstanding Including Common Stock Equivalents - Diluted Basis 69,948,960 69,531,790 Diluted Earnings Per Share $0.38 $0.14