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Retirement and Share-based Compensation Plans (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Share-based Compensation Expense By Plan | The following table summarizes compensation expense recognized for employees and directors as a result of share-based compensation:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (Dollars in thousands)
ESOP | $ | 1,474 |  |  | $ | 2,522 |  |  | $ | 2,604 |
Employee Incentive Plans | 2,155 |  |  | 1,207 |  |  | 1,911 |
Director Equity and Incentive Plan and Stock Option Plan | 812 |  |  | 685 |  |  | 613 |
| $ | 4,441 |  |  | $ | 4,414 |  |  | $ | 5,128 |
Changes in Stock Options Outstanding | Changes in the number of stock options outstanding during the years ended December 31, 2017, 2016 and 2015 are as follows:
| Number of Shares |  | Weighted-Average Exercise Price per Share |  | Total Exercise Price
| (Dollars in thousands, except per share data)
Outstanding at January 1, 2015 | 4,044,175 |  |  | $ | 15.02 |  |  | $ | 60,760 |
Granted | — |  |  | — |  |  | — |
Canceled | (47,300 | ) |  | 10.54 |  |  | (499 | )
Exercised | (552,884 | ) |  | 14.51 |  |  | (8,021 | )
Outstanding at December 31, 2015 | 3,443,991 |  |  | 15.17 |  |  | 52,240 |
Granted | — |  |  | — |  |  | — |
Canceled | (24,700 | ) |  | 14.83 |  |  | (366 | )
Exercised | (500,345 | ) |  | 9.97 |  |  | (4,989 | )
Outstanding at December 31, 2016 | 2,918,946 |  |  | 16.06 |  |  | 46,885 |
Granted | — |  |  | — |  |  | — |
Canceled | (57,200 | ) |  | 13.66 |  |  | (781 | )
Exercised | (881,481 | ) |  | 15.90 |  |  | (14,020 | )
Outstanding at December 31, 2017 | 1,980,265 |  |  | 16.20 |  |  | $ | 32,084 |
Schedule of Stock Options Outstanding, By Exercise Price Range | The following table summarizes information about stock options outstanding at December 31, 2017:
| Stock Options Outstanding and Vested
Range of Exercise Prices | Number of Awards |  | Remaining Life (yrs) |  | Weighted-Average Exercise Price Per Share
$5.07 - $8.02 | 182,500 |  |  | 1.36 |  | $ | 6.85 |
$9.27 - $11.35 | 575,055 |  |  | 1.75 |  | 10.15 |
$12.04 - $24.79 | 1,222,710 |  |  | 2.53 |  | 20.44 |
$5.07 - $24.79 | 1,980,265 |  |  | 2.20 |  | 16.20 |

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- Definition Tabular disclosure of the amount of total share-based compensation cost, including the amounts attributable to each share-based compensation plan and any related tax benefits. + 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 (h)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of option exercise prices, by grouped ranges, including the upper and lower limits of the price range, the number of shares under option, weighted average exercise price and remaining contractual option terms. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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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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