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Earnings Per Common Share And Share Awards (Tables) | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Computation Of Basic And Diluted Earnings Per Share | The following table sets forth the computation of basic and diluted earnings per share for the three- and nine-month periods ended September 30:
|  | Three Months Ended September 30, |  | Nine Months Ended September 30,
(in thousands, except per share amounts) |  | 2019 |  | 2018 |  | 2019 |  | 2018
Net income attributable to the Company |  | $ | 7,952 |  |  | $ | 10,634 |  |  | $ | 20,078 |  |  | $ | 21,757 |
Weighted average common shares outstanding – Basic |  | 1,889 |  |  | 1,887 |  |  | 1,888 |  |  | 1,886 |
Incremental shares outstanding assuming the exercise of dilutive SARs (share-settled) |  | 6 |  |  | 10 |  |  | 8 |  |  | 10 |
Weighted average common shares outstanding – Diluted |  | 1,895 |  |  | 1,897 |  |  | 1,896 |  |  | 1,896 |
Basic earnings per common share |  | $ | 4.21 |  |  | $ | 5.64 |  |  | $ | 10.63 |  |  | $ | 11.53 |
Diluted earnings per common share |  | $ | 4.20 |  |  | $ | 5.61 |  |  | $ | 10.59 |  |  | $ | 11.47 |
Summary Of Share-Based Award Transactions | A summary of share-based award transactions for all share-based award plans follows:
(in thousands, except weighted average exercise price and average remaining contractual term) | Number Of Shares |  | Weighted Average Exercise Price |  | Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding as of January 1, 2018 | 25 |  |  | $ | 93.40 |  |  | 3.98 |  | 2,624 |
SARs granted | 4 |  |  | 188.71 |  |  |  |  |  |
SARs exercised | (1 | ) |  | 41.50 |  |  |  |  |  |
Outstanding as of December 31, 2018 | 28 |  |  | $ | 110.27 |  |  | 3.64 |  | 2,019 |
SARs granted | 4 |  |  | 162.81 |  |  |  |  |  |
SARs exercised | (2 | ) |  | 50.50 |  |  |  |  |  |
Outstanding as of September 30, 2019 | 30 |  |  | $ | 124.13 |  |  | 3.78 |  | 1,367 |
Exercisable as of September 30, 2019 | 28 |  |  | $ | 120.99 |  |  | 3.55 |  | 1,367 |
Unvested as of September 30, 2019 | 2 |  |  | $ | 162.81 |  |  | 6.63 |  | — |
Share-Based Valuation Assumptions | The weighted average fair values for the SARs issued during 2019 and 2018 were $51.88 and $78.61, respectively, and were estimated using the weighted average assumptions shown in the table below.
| 2019 |  | 2018
Expected Life in Years | 7.0 |  | 7.0
Volatility | 30.2% |  | 39.0%
Interest Rate | 2.3% |  | 3.1%
Yield Rate | 1.0% |  | 0.8%

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + 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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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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