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Earnings Per Share (Tables) | 9 Months Ended
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Sep. 30, 2018
Earnings Per Share [Abstract] |
Reconciliation of Shares Used to Compute Basic and Diluted Earnings per Share | The following is a reconciliation of the shares used to compute basic and diluted earnings per share (in thousands):
| Three Months Ended |  | Nine Months Ended
| September 30, |  | September 30,
| 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average number of common shares outstanding used to compute basic earnings per share | 52,362 |  |  | 52,500 |  |  | 52,282 |  |  | 52,660 |
Dilutive effect of stock-based awards | 672 |  |  | 673 |  |  | 708 |  |  | 659 |
Number of shares used to compute diluted earnings per share | 53,034 |  |  | 53,173 |  |  | 52,990 |  |  | 53,319 |

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- Definition Tabular disclosure of the weighted average number of shares used in calculating basic net earnings per share (or unit) and diluted earnings per share (or unit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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