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Share-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Cash Proceeds Received from Share-based Payment Awards |
|  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
|  | (Amounts in thousands)
Cash received from stock option exercises |  | $ | 2,162 |  |  | $ | 1,632 |  |  | 2,111 |
Compensation cost, all share-based awards |  | 60 |  |  | 142 |  |  | 5,208 |
Excess tax (expense) benefit, all share-based awards |  | (8 | ) |  | 913 |  |  | 27 |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions | The following table provides the assumptions used in the calculation of grant-date fair values of stock options awarded during 2013 based on the Black-Scholes option pricing model:
| 2013
Weighted-average grant-date fair value | $7.11
Expected volatility | 33.16% - 33.18%
Weighted-average expected volatility | 33.17%
Risk-free interest rate | 0.88% - 1.60%
Expected dividend yield | 5.40% - 5.76%
Expected term in months | 72
Summary of Stock Option Activity | The following table presents a summary of the stock option activity under the Company’s plans for the year ended December 31, 2017:
| Shares |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value (in 000’s)
Outstanding at January 1, 2017 | 85,500 |  |  | $ | 47.52 |  |  |  |  |
Granted | — |  |  | — |  |  |  |  |
Exercised | (43,000) |  |  | $ | 50.28 |  |  |  |  |
Canceled or expired | — |  |  | $ | — |  |  |  |  |
Outstanding at December 31, 2017 | 42,500 |  |  | $ | 44.72 |  |  | 3.0 |  | $ | 371 |
Exercisable at December 31, 2017 | 42,500 |  |  | $ | 44.72 |  |  | 3.0 |  | $ | 371 |
Schedule of Options Authorized under Stock Option Plans, by Exercise Price Range | The following table presents information regarding stock options outstanding at December 31, 2017:
| Options Outstanding |  | Options Exercisable
Range of Exercise Prices | Number of Options |  | Weighted-Average Remaining Contractual Life (Years) |  | Weighted- Average Exercise Price |  | Number of Options |  | Weighted- Average Exercise Price
$33.61-$45.30 | 27,500 |  | 4.5 |  | $ | 42.64 |  |  | 27,500 |  | $ | 42.64 |
$47.61-$50.35 | 15,000 |  | 0.3 |  | $ | 48.52 |  |  | 15,000 |  | $ | 48.52 |
Summary of Grants | The following table presents the restricted stock unit grants summary at December 31, 2017:
| Grant Year
| 2016 |  | 2015
Three-year performance period ending December 31, | 2018 |  |  | 2017 |
Vesting shares, target (net of forfeited) | 83,250 |  |  | 85,750 |
Vesting shares, maximum (net of forfeited) | 156,094 |  |  | 160,781 |
Summary of Vested And Unvested RSU | The following table presents a summary of restricted stock unit awards activity, based on target vesting, during the years indicated:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| Shares |  | Weighted- Average Fair Value per Share |  | Shares |  | Weighted- Average Fair Value per Share |  | Shares |  | Weighted- Average Fair Value per Share
Outstanding at January 1 | 271,000 |  |  | $ | 51.09 |  |  | 263,250 |  |  | $ | 45.94 |  |  | 167,000 |  |  | $ | 41.15 |
Granted | — |  |  | — |  |  | 95,750 |  |  | $ | 53.49 |  |  | 100,250 |  |  | $ | 53.80 |
Vested | (82,000 | ) |  | $ | 45.17 |  |  | (78,500 | ) |  | $ | 36.82 |  |  | — |  |  | — |
Forfeited/Canceled | (20,000 | ) |  | $ | 53.62 |  |  | (9,500) |  |  | $ | 50.46 |  |  | (4,000) |  |  | $ | 43.10 |
Expired | — |  |  | — |  |  | — |  |  | — |  |  | — |  |  | — |
Outstanding at December 31 | 169,000 |  |  | $ | 53.66 |  |  | 271,000 |  |  | $ | 51.09 |  |  | 263,250 |  |  | $ | 45.94 |

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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