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Equity Incentive Plans (Tables) | 6 Months Ended
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Jun. 30, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |
Summary of the activity of stock option awards | A summary of the activity of stock option awards issued and outstanding under Company plans is as follows for the six months ended June 30, 2015:
| Shares |  | Wtd. Avg. Exercise Price |  | Wtd. Avg. Remaining Contractual Term (years) |  | Aggregate Intrinsic Value
| (in thousands) |  |  |  |  |  | (in thousands)
Options outstanding at December 31, 2014 | 664 |  |  | $ | 23.89 |  |  | 6.77 |  | $ | 10,935 |
Options granted | 256 |  |  | 43.15 |  |  |  |  |
Options exercised | (92 | ) |  | 22.80 |  |  |  |  |
Options forfeited/canceled/expired | (18 | ) |  | 36.85 |  |  |  |  |
Options outstanding at June 30, 2015 | 810 |  |  | $ | 29.82 |  |  | 7.28 |  | $ | 5,728 |
Options vested and expected to vest at June 30, 2015 | 762 |  |  | $ | 29.28 |  |  | 7.17 |  | $ | 5,670 |
Options exercisable at June 30, 2015 | 461 |  |  | $ | 24.01 |  |  | 5.95 |  | $ | 5,125 |
Summary of the activity of restricted stock | A summary of the activity of restricted stock outstanding is as follows for the six months ended June 30, 2015:
| Shares |  | Wtd. Avg. Grant Date Fair Value
| (in thousands) |  |
Restricted stock outstanding at December 31, 2014 | 724 |  |  | $ | 30.97 |
Granted | 423 |  |  | 45.83 |
Vested | (156 | ) |  | 29.57 |
Forfeited/canceled | (15 | ) |  | 38.73 |
Restricted stock outstanding at June 30, 2015 | 976 |  |  | $ | 37.50 |

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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 the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired 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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