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Earnings Per Share | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Earnings Per Share | 8. Earnings Per Share The amounts used in computing earnings per share and the weighted average number of shares of potentially dilutive securities are as follows:
| Three months ended September 30, | Nine months ended September 30,
(in thousands, except market price and earnings per share) | 2018 | 2017 | 2018 | 2017
Net income attributable to the Company | $28,215 | $15,269 | $68,825 | $27,225
Weighted average number of shares: |  |  |  |
Weighted average number of shares used in |  |  |  |
calculating basic net income per share | 32,264 | 32,187 | 32,247 | 32,160
Effect of dilutive stock-based compensation plans: |  |  |  |
Stock options | 16 | 27 | 16 | 33
Weighted average number of shares used in |  |  |  |
calculating diluted net income per share | 32,280 | 32,214 | 32,263 | 32,193
Average market price of common stock used |  |  |  |
for calculation of dilutive shares | $72.30 | $53.49 | $66.01 | $49.49
Net income attributable to the Company per share: |  |  |  |
Basic | $0.87 | $0.47 | $2.13 | $0.85
Diluted | $0.87 | $0.47 | $2.13 | $0.85

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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