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Stock-Based Compensation (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Schedule of Share-based Compensation, Stock Options, Activity | The following table summarizes stock option activity under the Company’s active stock option plans for the year ended December 31, 2017:
| Number of Shares |  | Weighted-Average Exercise Price |  | Weighted-Average Remaining Contract Life
Outstanding options, beginning of year | 940,843 |  |  | $ | 16.77 |  |  |
Exercised | (285,887 | ) |  | 18.15 |  |  |
Forfeited | (12,701 | ) |  | 17.86 |  |  |
Outstanding options, end of year | 642,255 |  |  | $ | 16.13 |  |  | 2.34 years
Outstanding options exercisable, end of year | 642,255 |  |  | $ | 16.13 |  |  | 2.34 years
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | The following table presents information regarding the Company’s restricted stock as of December 31, 2017:
| Number of Shares |  | Weighted-Average Measurement Date Fair Value
Restricted stock, beginning of year | 317,055 |  |  | $ | 26.22 |
Granted | 140,246 |  |  | 41.46 |
Vested | (111,224 | ) |  | 26.14 |
Forfeited | (53,571 | ) |  | 27.96 |
Restricted stock, end of year | 292,506 |  |  | $ | 33.24 |

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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