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Stockholders' Equity (Tables) | 12 Months Ended
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Dec. 31, 2013
Equity [Abstract] |
Stock option plan activity | Following is a summary of the Company’s stock option plan activity and related information:
| Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term in Years |  | Aggregate Intrinsic Value (In thousands)
Balance at December 31, 2010 | 641,261 |  |  | $ | 21.36 |  |  | 7.00 |  | $ | 9 |
Granted | 636,580 |  |  | 9.98 |  |  |  |  |
Exercised | (6,072 | ) |  | 9.51 |  |  |  |  |
Forfeited | (50,782 | ) |  | 11.95 |  |  |  |  |
Cancelled | (74,941 | ) |  | 34.55 |  |  |  |  |
Balance at December 31, 2011 | 1,146,046 |  |  | 14.61 |  |  | 7.96 |  | 1,489 |
Granted | 714,345 |  |  | 14.72 |  |  |  |  |
Exercised | (86,588 | ) |  | 11.31 |  |  |  |  |
Forfeited | (118,026 | ) |  | 11.39 |  |  |  |  |
Cancelled | (29,171 | ) |  | 24.16 |  |  |  |  |
Balance at December 31, 2012 | 1,626,606 |  |  | 14.90 |  |  | 7.83 |  | 11,358 |
Granted | 439,929 |  |  | 23.61 |  |  |  |  |
Exercised | (217,069 | ) |  | 14.60 |  |  |  |  |
Forfeited | (73,978 | ) |  | 16.72 |  |  |  |  |
Cancelled | (28,779 | ) |  | 29.87 |  |  |  |  |
Balance at December 31, 2013 | 1,746,709 |  |  | 16.79 |  |  | 7.57 |  | 62,705 |
Exercisable at December 31, 2013 | 977,351 |  |  | 15.69 |  |  | 6.87 |  | 36,232 |
Options vested and expected to vest as of December 31, 2013 | 1,746,709 |  |  | $ | 16.79 |  |  | 7.57 |  | $ | 62,705 |
Stock option plan activity, by exercise price range | Following is a further breakdown of the options outstanding as of December 31, 2013:
Range of exercise prices | Options outstanding |  | Weighted average remaining life in years |  | Weighted average exercise price |  | Options exercisable |  | Weighted average exercise price
$6.82 – $ 10.05 | 459,732 |  |  | 6.97 |  | $ | 9.94 |  |  | 350,804 |  |  | $ | 9.92 |
10.12 – 13.53 | 113,684 |  |  | 7.90 |  | 11.39 |  |  | 106,070 |  |  | 11.34 |
14.47 – 14.47 | 489,633 |  |  | 8.11 |  | 14.47 |  |  | 204,019 |  |  | 14.47 |
16.14 – 21.00 | 199,248 |  |  | 5.21 |  | 18.14 |  |  | 184,301 |  |  | 18.11 |
21.92 – 87.96 | 484,412 |  |  | 8.50 |  | 26.35 |  |  | 132,157 |  |  | 33.00 |
6.82 – 87.96 | 1,746,709 |  |  | 7.57 |  | $ | 16.79 |  |  | 977,351 |  |  | $ | 15.69 |
Restricted stock activity | The following is a summary of the Company’s restricted stock activity and related information:
| Shares |  | Weighted-Average Grant Date Fair Value
Nonvested at December 31, 2010 | 62,146 |  |  | $ | 13.60 |
Granted | 119,826 |  |  | 10.07 |
Vested | (59,936 | ) |  | 12.47 |
Forfeited | (6,530 | ) |  | 11.71 |
Nonvested at December 31, 2011 | 115,506 |  |  | 10.63 |
Granted | 109,261 |  |  | 13.76 |
Vested | (72,194 | ) |  | 11.47 |
Forfeited | (11,012 | ) |  | 11.84 |
Nonvested at December 31, 2012 | 141,561 |  |  | 12.52 |
Granted | 84,547 |  |  | 27.71 |
Vested | (85,681 | ) |  | 14.59 |
Forfeited | (25,041 | ) |  | 13.38 |
Nonvested at December 31, 2013 | 115,386 |  |  | $ | 21.93 |

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- Definition Tabular disclosure of the changes in outstanding nonvested restricted stock units. + 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)(2) -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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- 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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