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Share-Based Compensation (Tables) | 9 Months Ended
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Sep. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Unrecognized Share-Based Compensation Expense | As of September 30, 2015, unrecognized share-based compensation expense was as follows:
| Unrecognized Expense |  | Average Expected Recognition Period
| (in thousands)
Stock option awards | $ | 785 |  |  | 1.3 years
Restricted stock awards | 2,499 |  |  | 1.9 years
Total unrecognized share-based compensation expense | $ | 3,284 |  |  | 1.8 years
Summary of Stock Options Outstanding under Plans | The table below provides stock option information for the three months ended September 30, 2015:
| Number of Shares |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Life |  | Aggregate Intrinsic Value of In-the- Money Options |
| (in thousands, except share and per share data) |
Options outstanding at beginning of period | 553,440 |  |  | $ | 24.42 |  |  | 7.8 years |  | $ | 1,764 |  | (1)
Options exercised | (13,311 | ) |  | $ | 12.54 |  |  | 6.5 years |  | — |  |
Options forfeited | (2,875 | ) |  | $ | 12.54 |  |  | 7.2 years |  | — |  |
Options expired | (1,375 | ) |  | $ | 144.00 |  |  | 0.6 years |  | — |  |
Options outstanding at end of period | 535,879 |  |  | $ | 24.47 |  |  | 7.6 years |  | $ | 4,099 |  | (2)
Options exercisable at end of period | 304,251 |  |  | $ | 29.09 |  |  | 7.0 years |  | $ | 2,511 |  | (2)
(1) | Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $24.84 as of June 30, 2015, over the exercise price, multiplied by the number of options.
(2) | Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $25.20 as of September 30, 2015, over the exercise price, multiplied by the number of options.
The table below provides stock option information for the nine months ended September 30, 2015:
| Number of Shares |  | Weighted- Average Exercise Price Per Share |  | Weighted Average Remaining Contractual Life |  | Aggregate Intrinsic Value of In-the- Money Options |
| (in thousands, except share and per share data) |
Options outstanding at beginning of period | 603,872 |  |  | $ | 23.78 |  |  | 8.3 years |  | $ | 2,853 |  | (1)
Options granted | 28,000 |  |  | $ | 23.47 |  |  | 9.7 years |  |  |
Options exercised | (39,766 | ) |  | $ | 13.36 |  |  | 7.1 years |  |  |
Options forfeited | (54,502 | ) |  | $ | 20.67 |  |  | 8.5 years |  |  |
Options expired | (1,725 | ) |  | $ | 144.00 |  |  | 0.6 years |  |  |
Options outstanding at end of period | 535,879 |  |  | $ | 24.47 |  |  | 7.6 years |  | $ | 4,099 |  | (2)
Options exercisable at end of period | 304,251 |  |  | $ | 29.09 |  |  | 7.0 years |  | $ | 2,511 |  | (2)
(1) | Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $21.81 as of December 31, 2014, over the exercise price, multiplied by the number of options.
(2) | Intrinsic value represents the excess of the closing stock price on the last trading day of the period, which was $25.20 as of September 30, 2015, over the exercise price, multiplied by the number of options.
Schedule of Restricted Stock Awards | The table below provides information for restricted stock awards for the three and nine months ended September 30, 2015:
| Three Months Ended September 30, 2015 |  | Nine Months Ended September 30, 2015
| Number of Shares |  | Weighted- Average Grant Date Fair Value Per Share |  | Number of Shares |  | Weighted- Average Grant Date Fair Value Per Share
Restricted stock at beginning of period | 193,255 |  |  | $ | 19.22 |  |  | 173,222 |  |  | $ | 19.58 |
Restricted stock granted | 2,589 |  |  | $ | 24.00 |  |  | 55,773 |  |  | $ | 22.50 |
Restricted stock vested | (41,367 | ) |  | $ | 17.58 |  |  | (59,518 | ) |  | $ | 19.08 |
Restricted stock forfeited | (1,350 | ) |  | $ | 17.61 |  |  | (16,350 | ) |  | $ | 21.49 |
Restricted stock at end of period | 153,127 |  |  | $ | 20.64 |  |  | 153,127 |  |  | $ | 20.64 |

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- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + 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 (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&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=6415400&loc=d3e5070-113901 + Details
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